# Nunada Academy

> Nunada Academy teaches mathematics and coding step by step, in English and Bahasa Indonesia. The articles below are free, need no account, and can be read in any order. Each has a quick answer, a table of contents, interactive practice, a FAQ and references.

## About

- [About Nunada Academy](https://nunada.my.id/about/): Nunada Academy is a learning site for mathematics and programming in English and Bahasa Indonesia, with step-by-step courses, interactive practice and free articles that need no account.
- [Tentang Nunada Academy](https://nunada.my.id/tentang/): Nunada Academy adalah situs belajar matematika dan pemrograman dalam bahasa Inggris dan Bahasa Indonesia, dengan kursus langkah demi langkah, latihan interaktif, dan artikel gratis yang tidak memerlukan akun.

## Articles (English)

- [Cuboid: Volume, Surface Area, Diagonals and Fitting Things In](https://nunada.my.id/articles/cuboid/): The cuboid, or rectangular box: volume, surface and lateral area, the diagonals, why the cube holds the most, rods that fit, Euler bricks, and the box in code.
- [Cube: Faces, Nets, Volume, Diagonals and Cross-Sections](https://nunada.my.id/articles/cube/): The cube: 6 faces, 12 edges and 8 corners, its 11 nets, surface area, volume, diagonals, slices that give a hexagon, doubling the cube, and the cube in code.
- [Systems of Linear Equations in Two Variables: Methods and Graphs](https://nunada.my.id/articles/linear-systems-two-variables/): Solve two linear equations in two unknowns: the graph, substitution, elimination, Cramer’s rule, word problems, and why nearly parallel lines break programs.
- [Law of Cosines: Pythagoras for Every Triangle, and What It Solves](https://nunada.my.id/articles/law-of-cosines/): The law of cosines: why c² = a² + b² − 2ab cos C, solving a triangle from two sides and the angle between or from three sides, forces, bearings, and thin triangles.
- [Law of Sines: Solving Triangles, the Ambiguous Case and Surveying](https://nunada.my.id/articles/law-of-sines/): The law of sines: why a/sin A = b/sin B = c/sin C = 2R, solving a triangle from two angles and a side, the ambiguous SSA case, area, and measuring across a river.
- [Graphs of Trigonometric Functions: All Six, and How to Sketch Them](https://nunada.my.id/articles/trigonometric-graphs/): The graphs of all six trigonometric functions: asymptotes, period and range, what a, b, c and d do, sketching, reading an equation, adding waves and fitting data.
- [Trigonometric Equations: How to Solve sin x = c and Harder Ones](https://nunada.my.id/articles/trigonometric-equations/): How to solve trigonometric equations: solutions in an interval, multiple angles, quadratics, identities, a sin x + b cos x = c, false roots and numerical methods.
- [Trigonometric Identities: Sum, Double-Angle Formulas and Proofs](https://nunada.my.id/articles/trigonometric-identities/): Trigonometric identities explained: the Pythagorean, sum, double-angle, half-angle and product formulas, how to prove an identity, and how to test one.
- [Basic Trigonometry: Sine, Cosine and Tangent](https://nunada.my.id/articles/basic-trigonometry/): Basic trigonometry explained: sine, cosine and tangent of a right triangle, exact values at 30°, 45° and 60°, the unit circle, identities, equations and graphs.
- [Constructing Segments and Angles with a Ruler and Compass](https://nunada.my.id/articles/constructing-segments-and-angles/): Construct segments and angles with a ruler and compass: copy, bisect, perpendicular, parallel, 60°, 90°, 30°, 45°, equal parts, and what cannot be built.
- [Angles: Measuring, Types, Pairs and Parallel Lines](https://nunada.my.id/articles/angles/): Angles explained: degrees, radians and turns, types and pairs of angles, parallel lines and transversals, polygon angles, clock angles and bearings.
- [LaTeX: Writing Mathematics and Documents](https://nunada.my.id/articles/latex/): LaTeX for beginners: write math formulas, build a document, find symbol commands, use packages and bibliographies, and fix the common errors.
- [Tower of Hanoi](https://nunada.my.id/articles/tower-of-hanoi/): The Tower of Hanoi explained: the recursive solution, why 2^n - 1 moves is optimal, the binary pattern, the Sierpinski graph and four pegs, with code.
- [Fibonacci Numbers](https://nunada.my.id/articles/fibonacci-numbers/): Fibonacci numbers explained: the recurrence, Binet's formula, identities, fast doubling, Zeckendorf sums, Pisano periods and the golden ratio, with code.
- [Binary Search and Sorting](https://nunada.my.id/articles/binary-search-and-sorting/): Binary search and sorting explained: halving a sorted list, lower and upper bounds, searching an answer, selection, insertion, merge, quick and heap sort.
- [Big-O Notation](https://nunada.my.id/articles/big-o-notation/): Big-O notation explained: the definition, growth rates from O(1) to O(n!), counting steps in code, best and worst case, recurrences and the Master theorem.
- [Floating-Point Numbers](https://nunada.my.id/articles/floating-point-numbers/): How floating-point numbers work: the IEEE 754 bits, spacing and rounding, NaN and infinity, accumulated errors, cancellation, comparisons, and which type to use.
- [Newton’s Method](https://nunada.my.id/articles/newtons-method/): Newton’s method for solving f(x) = 0: the formula from tangent lines, examples, quadratic convergence, when it fails, square roots by hand, and code.
- [Applied Optimization](https://nunada.my.id/articles/applied-optimization/): Applied optimization with derivatives: the four steps for max and min word problems, geometry, Snell’s law, marginal cost and inventory, with examples and code.
- [Indeterminate Forms and L’Hôpital’s Rule](https://nunada.my.id/articles/indeterminate-forms-and-lhopitals-rule/): L’Hôpital’s Rule and the indeterminate forms 0/0, ∞/∞, 0·∞, ∞−∞, 1^∞, 0^0 and ∞^0: how to use it, when it fails, and a proof by Cauchy’s theorem, with code.
- [Concavity and Curve Sketching](https://nunada.my.id/articles/concavity-and-curve-sketching/): Concavity and curve sketching: the second derivative, points of inflection, the Second Derivative Test and seven steps to sketch a graph, with examples and code.
- [Monotonic Functions and the First Derivative Test](https://nunada.my.id/articles/monotonic-functions-and-the-first-derivative-test/): Monotonic functions and the First Derivative Test: where a function rises and falls from the sign of f′, local extrema, sign charts and inequalities, with code.
- [The Mean Value Theorem](https://nunada.my.id/articles/the-mean-value-theorem/): The Mean Value Theorem and Rolle’s Theorem: statements, proofs, how to find c, speed and rates, and the corollaries about constant functions, with examples and code.
- [Extreme Values of Functions on Closed Intervals](https://nunada.my.id/articles/extreme-values-on-closed-intervals/): Extreme values on closed intervals: absolute and local extremes, the Extreme Value Theorem, critical points and the closed interval method, with examples and code.
- [Linearization and Differentials](https://nunada.my.id/articles/linearization-and-differentials/): Linearization and differentials: the tangent-line approximation L(x) = f(a) + f′(a)(x − a), df = f′(x) dx, estimates, errors, percentage change and code.
- [Related Rates](https://nunada.my.id/articles/related-rates/): Related rates: differentiate an equation in time to find an unknown rate, with the four-step strategy, six worked examples, a sliding ladder and common mistakes.
- [Inverse Trigonometric Functions](https://nunada.my.id/articles/inverse-trigonometric-functions/): Inverse trigonometric functions: domains and ranges, the derivatives of arcsin, arctan and arcsec with proofs, cofunction identities, and the best viewing angle.
- [Derivatives of Inverse Functions and Logarithms](https://nunada.my.id/articles/derivatives-of-inverse-functions-and-logarithms/): Derivatives of inverse functions and logarithms: the rule for inverses, d/dx ln x = 1/x, a^x, log base a, logarithmic differentiation, and the number e.
- [Implicit Differentiation](https://nunada.my.id/articles/implicit-differentiation/): Implicit differentiation explained: find dy/dx without solving for y, tangent and normal lines, second derivatives, rational powers, pitfalls, and code.
- [The Chain Rule](https://nunada.my.id/articles/the-chain-rule/): The chain rule explained: how to find the inside and outside of a composite function, the power chain rule, nested functions, second derivatives, and code.
- [Derivatives of Trigonometric Functions](https://nunada.my.id/articles/derivatives-of-trigonometric-functions/): Derivatives of trigonometric functions with proofs: sin x and cos x, then tan, cot, sec and csc, why radians, simple harmonic motion, higher derivatives, and code.
- [The Derivative as a Rate of Change](https://nunada.my.id/articles/the-derivative-as-a-rate-of-change/): The derivative as a rate of change: velocity, speed, acceleration and jerk, free fall, marginal cost and revenue, sensitivity to change, and rates from data in code.
- [Differentiation Rules](https://nunada.my.id/articles/differentiation-rules/): Differentiation rules with proofs and examples: constant, power, multiple, sum, product and quotient rules, the derivative of e^x, and higher-order derivatives.
- [The Derivative as a Function](https://nunada.my.id/articles/the-derivative-as-a-function/): The derivative as a function: f′(x) from the definition, notation, graphing f′ from f, step functions, domains, one-sided derivatives and corners, and code.
- [Tangent Lines and the Derivative at a Point](https://nunada.my.id/articles/tangent-lines-and-derivative-at-a-point/): Tangent lines and the derivative at a point: secant slopes, the definition of f′(a), tangent and normal lines, rates of change, and where no derivative exists.
- [The Pythagorean Theorem: Proofs, Triples and Applications](https://nunada.my.id/articles/pythagorean-theorem/): The Pythagorean theorem explained: the statement, four proofs, the converse and the 3-4-5 rule, Pythagorean triples, the distance formula, and generalizations.
- [Circles: Circumference, Area, Angles and Equations](https://nunada.my.id/articles/circles/): Circles explained: pi, circumference and area, arcs and sectors, angle theorems, chords and tangents, the equation of a circle, and how lines and circles meet.
- [Triangles: Types, Angles, Area, Centers and Congruence](https://nunada.my.id/articles/triangles/): Triangles explained: types by sides and angles, the 180° angle sum, the triangle inequality, area and Heron's formula, centers, congruence and the law of sines.
- [Quadrilaterals: Types, Properties, Perimeter and Area](https://nunada.my.id/articles/quadrilaterals/): Quadrilaterals explained: square, rectangle, rhombus, parallelogram, kite and trapezoid, their properties, perimeter, area and coordinates, with practice.
- [Geometric Sequences and Series: Ratio, Sums and Growth](https://nunada.my.id/articles/geometric-sequences-and-series/): Geometric sequences and series explained: common ratio, the n-th term, finite and infinite sums, geometric means, compound interest and decay, with practice.
- [Arithmetic Sequences and Series: Formulas, Sums and Examples](https://nunada.my.id/articles/arithmetic-sequences-and-series/): Arithmetic sequences and series explained: common difference, the n-th term, the sum formula, Gauss’s trick, arithmetic means and word problems, with practice.
- [Binary Numbers: How Computers Count, Convert and Calculate](https://nunada.my.id/articles/binary-numbers/): Binary numbers explained: bits and place value, converting to decimal and hex, binary arithmetic, two’s complement, bitwise operators and binary fractions.
- [Irrational Numbers: Definition, Examples, Proofs and Approximations](https://nunada.my.id/articles/irrational-numbers/): Irrational numbers explained: why √2 is irrational, which roots are, sums and products, π, e, transcendental numbers and fraction approximations, with practice.
- [Rational Numbers: Fractions, Operations, Decimals and Percent](https://nunada.my.id/articles/rational-numbers/): Rational numbers explained: fractions, equivalent forms, comparing, the four operations, mixed numbers, decimals and percent, with worked examples and practice.
- [Integers: Number Line, Operations, Divisibility, GCD and LCM](https://nunada.my.id/articles/integers/): Integers explained: the number line, adding and multiplying negatives, divisibility, primes, GCD and LCM, and remainders, with worked examples and practice.
- [Algebraic Expressions: Terms, Simplifying, Expanding and Factoring](https://nunada.my.id/articles/algebraic-expressions/): Algebraic expressions explained: terms, like terms, evaluating, expanding brackets, factoring and algebraic fractions, with worked examples and practice.
- [Exponents and Radicals: Laws, Rules, Examples and Practice](https://nunada.my.id/articles/exponents-and-radicals/): Exponents and radicals explained: the five laws, zero, negative and fractional exponents, simplifying roots, rationalizing and scientific notation, with practice.
- [Numbers in Chinese: Mandarin Numerals from 0 to Billions](https://nunada.my.id/articles/chinese-numbers/): How to count and read numbers in Chinese: Mandarin numerals from 0 to billions, 万 and 亿, zeros, 两 vs 二, formal numerals, with a converter and quizzes.
- [Real Numbers: Definition, Types, Examples and Properties](https://nunada.my.id/articles/real-numbers/): Real numbers explained: definition, types (rational and irrational), examples, properties and the number line, with interactive practice, a proof and FAQ.

## Artikel (Bahasa Indonesia)

- [Balok: Volume, Luas Permukaan, Diagonal, dan Cara Memuat Benda](https://nunada.my.id/artikel/balok/): Balok: volume, luas permukaan dan luas selimut, diagonal, mengapa kubus memuat paling banyak, batang yang muat, bata Euler, dan balok dalam kode.
- [Kubus: Sisi, Jaring-Jaring, Volume, Diagonal, dan Irisan](https://nunada.my.id/artikel/kubus/): Kubus: 6 sisi, 12 rusuk, 8 titik sudut, 11 jaring-jaringnya, luas permukaan, volume, diagonal, irisan segienam, menggandakan kubus, dan kubus dalam kode.
- [Sistem Persamaan Linear Dua Variabel (SPLDV): Metode dan Grafik](https://nunada.my.id/artikel/sistem-persamaan-linear-dua-variabel/): Menyelesaikan dua persamaan linear dengan dua variabel: grafik, substitusi, eliminasi, aturan Cramer, soal cerita, dan mengapa garis hampir sejajar merusak program.
- [Aturan Kosinus: Pythagoras untuk Setiap Segitiga dan Kegunaannya](https://nunada.my.id/artikel/aturan-kosinus/): Aturan kosinus: mengapa c² = a² + b² − 2ab cos C, memecahkan segitiga dari dua sisi dan sudut apit atau dari tiga sisi, gaya, arah mata angin, dan segitiga tipis.
- [Aturan Sinus: Memecahkan Segitiga, Kasus Ambigu, dan Survei](https://nunada.my.id/artikel/aturan-sinus/): Aturan sinus: mengapa a/sin A = b/sin B = c/sin C = 2R, memecahkan segitiga dari dua sudut dan satu sisi, kasus ambigu SSA, luas, dan mengukur lebar sungai.
- [Grafik Fungsi Trigonometri: Keenam Fungsi dan Cara Membuatnya](https://nunada.my.id/artikel/grafik-fungsi-trigonometri/): Grafik keenam fungsi trigonometri: asimtot, periode, pengaruh a, b, c, d, cara membuat sketsa, membaca persamaan, menjumlahkan gelombang, dan mencocokkan data.
- [Persamaan Trigonometri: Menyelesaikan sin x = c dan Lainnya](https://nunada.my.id/artikel/persamaan-trigonometri/): Cara menyelesaikan persamaan trigonometri: penyelesaian dalam interval, sudut kelipatan, kuadrat, identitas, a sin x + b cos x = c, akar palsu, dan metode numerik.
- [Identitas Trigonometri: Rumus Jumlah, Sudut Ganda, dan Pembuktian](https://nunada.my.id/artikel/identitas-trigonometri/): Identitas trigonometri dijelaskan: rumus Pythagoras, jumlah, sudut ganda, sudut paruh, dan hasil kali, cara membuktikan identitas, dan cara mengujinya.
- [Trigonometri Dasar: Sinus, Kosinus, dan Tangen](https://nunada.my.id/artikel/trigonometri-dasar/): Trigonometri dasar dijelaskan: sinus, kosinus, dan tangen segitiga siku-siku, nilai eksak pada 30°, 45°, dan 60°, lingkaran satuan, identitas, persamaan, dan grafik.
- [Melukis Ruas Garis dan Sudut dengan Penggaris dan Jangka](https://nunada.my.id/artikel/melukis-ruas-garis-dan-sudut/): Melukis ruas garis dan sudut dengan penggaris dan jangka: menyalin, membagi dua, tegak lurus, sejajar, 60°, 90°, 30°, 45°, bagian sama, dan yang mustahil dilukis.
- [Sudut: Pengukuran, Jenis, Pasangan, dan Garis Sejajar](https://nunada.my.id/artikel/sudut/): Sudut dijelaskan: derajat, radian, dan putaran, jenis dan pasangan sudut, garis sejajar dan garis lintang, sudut segi banyak, sudut jam, dan bearing.
- [LaTeX: Menulis Matematika dan Dokumen](https://nunada.my.id/artikel/latex/): LaTeX untuk pemula: menulis rumus matematika, menyusun dokumen, mencari perintah simbol, memakai paket dan daftar pustaka, dan memperbaiki galat umum.
- [Menara Hanoi](https://nunada.my.id/artikel/menara-hanoi/): Menara Hanoi dijelaskan: solusi rekursif, mengapa 2^n - 1 langkah optimal, pola biner, graf Sierpinski, dan empat tiang, lengkap dengan kode.
- [Bilangan Fibonacci](https://nunada.my.id/artikel/bilangan-fibonacci/): Bilangan Fibonacci dijelaskan: rekurensi, rumus Binet, identitas, penggandaan cepat, jumlah Zeckendorf, periode Pisano, dan rasio emas, lengkap dengan kode.
- [Pencarian Biner dan Pengurutan](https://nunada.my.id/artikel/pencarian-biner-dan-pengurutan/): Pencarian biner dan pengurutan dijelaskan: membelah daftar terurut, batas bawah dan atas, mencari jawaban, serta selection, insertion, merge, quick, dan heap sort.
- [Notasi Big-O](https://nunada.my.id/artikel/notasi-big-o/): Notasi Big-O dijelaskan: definisi, laju pertumbuhan dari O(1) sampai O(n!), menghitung langkah dalam kode, kasus terbaik dan terburuk, rekurensi, dan teorema Master.
- [Bilangan Floating-Point](https://nunada.my.id/artikel/bilangan-floating-point/): Cara kerja bilangan floating-point: bit IEEE 754, jarak dan pembulatan, NaN dan tak hingga, galat yang menumpuk, pembatalan, perbandingan, dan tipe yang dipakai.
- [Metode Newton](https://nunada.my.id/artikel/metode-newton/): Metode Newton untuk menyelesaikan f(x) = 0: rumus dari garis singgung, contoh, konvergensi kuadrat, kapan gagal, akar kuadrat dengan tangan, dan kode.
- [Optimisasi Terapan](https://nunada.my.id/artikel/optimisasi-terapan/): Optimisasi terapan dengan turunan: empat langkah soal cerita maksimum dan minimum, geometri, hukum Snell, biaya marjinal dan persediaan, dengan contoh dan kode.
- [Bentuk Tak Tentu dan Aturan L’Hôpital](https://nunada.my.id/artikel/bentuk-tak-tentu-dan-aturan-lhopital/): Aturan L’Hôpital dan bentuk tak tentu 0/0, ∞/∞, 0·∞, ∞−∞, 1^∞, 0^0, dan ∞^0: cara memakainya, kapan gagal, dan buktinya dengan teorema Cauchy, dengan kode.
- [Kecekungan dan Penggambaran Kurva](https://nunada.my.id/artikel/kecekungan-dan-penggambaran-kurva/): Kecekungan dan penggambaran kurva: turunan kedua, titik belok, Uji Turunan Kedua, dan tujuh langkah menggambar grafik, dengan contoh dan kode.
- [Fungsi Monoton dan Uji Turunan Pertama](https://nunada.my.id/artikel/fungsi-monoton-dan-uji-turunan-pertama/): Fungsi monoton dan Uji Turunan Pertama: di mana fungsi naik dan turun dari tanda f′, ekstrem lokal, bagan tanda, dan pertidaksamaan, dengan contoh dan kode.
- [Teorema Nilai Rata-rata](https://nunada.my.id/artikel/teorema-nilai-rata-rata/): Teorema Nilai Rata-rata dan Teorema Rolle: pernyataan, bukti, cara mencari c, kecepatan dan laju, serta akibatnya tentang fungsi konstan, dengan contoh dan kode.
- [Nilai Ekstrem Fungsi pada Selang Tertutup](https://nunada.my.id/artikel/nilai-ekstrem-pada-selang-tertutup/): Nilai ekstrem pada selang tertutup: maksimum dan minimum mutlak dan lokal, Teorema Nilai Ekstrem, titik kritis, dan metode selang tertutup, dengan contoh dan kode.
- [Linearisasi dan Diferensial](https://nunada.my.id/artikel/linearisasi-dan-diferensial/): Linearisasi dan diferensial: hampiran garis singgung L(x) = f(a) + f′(a)(x − a), df = f′(x) dx, perkiraan, galat, dan perubahan persen, dengan contoh dan kode.
- [Laju Terkait](https://nunada.my.id/artikel/laju-terkait/): Laju terkait: turunkan persamaan terhadap waktu untuk mencari laju yang dicari, dengan strategi empat langkah, enam contoh soal, tangga meluncur, dan kesalahan umum.
- [Fungsi Trigonometri Invers](https://nunada.my.id/artikel/fungsi-trigonometri-invers/): Fungsi trigonometri invers: domain dan jangkauan, turunan arcsin, arctan, dan arcsec dengan bukti, identitas kofungsi, dan sudut pandang terbaik.
- [Turunan Fungsi Invers dan Logaritma](https://nunada.my.id/artikel/turunan-fungsi-invers-dan-logaritma/): Turunan fungsi invers dan logaritma: aturan untuk invers, d/dx ln x = 1/x, a^x, logaritma basis a, diferensiasi logaritmik, dan bilangan e.
- [Diferensiasi Implisit](https://nunada.my.id/artikel/diferensiasi-implisit/): Diferensiasi implisit dijelaskan: mencari dy/dx tanpa menyelesaikan untuk y, garis singgung dan normal, turunan kedua, pangkat rasional, jebakan, dan kode.
- [Aturan Rantai](https://nunada.my.id/artikel/aturan-rantai/): Aturan rantai dijelaskan: cara menemukan fungsi dalam dan luar suatu fungsi komposit, aturan rantai pangkat, fungsi bersarang, turunan kedua, dan kode.
- [Turunan Fungsi Trigonometri](https://nunada.my.id/artikel/turunan-fungsi-trigonometri/): Turunan fungsi trigonometri dengan bukti: sin x dan cos x, lalu tan, cot, sec, dan csc, mengapa radian, gerak harmonik sederhana, turunan tingkat tinggi, dan kode.
- [Turunan sebagai Laju Perubahan](https://nunada.my.id/artikel/turunan-sebagai-laju-perubahan/): Turunan sebagai laju perubahan: kecepatan, laju, percepatan dan sentakan, jatuh bebas, biaya dan pendapatan marjinal, kepekaan terhadap perubahan, serta kode.
- [Aturan Turunan](https://nunada.my.id/artikel/aturan-turunan/): Aturan turunan dengan bukti dan contoh: aturan konstanta, pangkat, kelipatan, jumlah, hasil kali, hasil bagi, turunan e^x, dan turunan tingkat tinggi.
- [Turunan sebagai Fungsi](https://nunada.my.id/artikel/turunan-sebagai-fungsi/): Turunan sebagai fungsi: f′(x) dari definisi, notasi, menggambar grafik f′ dari f, fungsi tangga, daerah asal, turunan sepihak dan sudut tajam, serta kode numerik.
- [Garis Singgung dan Turunan di Suatu Titik](https://nunada.my.id/artikel/garis-singgung-dan-turunan-di-suatu-titik/): Garis singgung dan turunan di suatu titik: gradien garis potong dan limit, definisi f′(a), garis singgung dan normal, laju perubahan, serta kapan turunan tidak ada.
- [Teorema Pythagoras: Bukti, Tripel, dan Penerapan](https://nunada.my.id/artikel/teorema-pythagoras/): Teorema Pythagoras: pernyataan, empat bukti, kebalikan dan aturan 3-4-5, tripel Pythagoras, rumus jarak, dan perluasannya, dengan latihan soal.
- [Lingkaran: Keliling, Luas, Sudut, dan Persamaan](https://nunada.my.id/artikel/lingkaran/): Lingkaran: pi, keliling dan luas, busur dan juring, teorema sudut, tali busur dan garis singgung, persamaan lingkaran, dan kedudukan garis, dengan latihan.
- [Segitiga: Jenis, Sudut, Luas, Titik Penting, dan Kekongruenan](https://nunada.my.id/artikel/segitiga/): Segitiga: jenis menurut sisi dan sudut, jumlah sudut 180°, ketaksamaan segitiga, luas dan rumus Heron, titik penting, kekongruenan, dan aturan sinus, dengan latihan.
- [Segiempat: Jenis, Sifat, Keliling, dan Luas](https://nunada.my.id/artikel/segiempat/): Segiempat: persegi, persegi panjang, belah ketupat, jajargenjang, layang-layang, dan trapesium, beserta sifat, keliling, luas, dan koordinat, dengan latihan.
- [Barisan dan Deret Geometri: Rasio, Jumlah, dan Pertumbuhan](https://nunada.my.id/artikel/barisan-dan-deret-geometri/): Barisan dan deret geometri: rasio, rumus suku ke-n, jumlah berhingga dan tak hingga, rata-rata geometri, bunga majemuk, dan peluruhan, dengan latihan.
- [Barisan dan Deret Aritmetika: Rumus, Jumlah, dan Contoh](https://nunada.my.id/artikel/barisan-dan-deret-aritmetika/): Barisan dan deret aritmetika: beda, rumus suku ke-n, rumus jumlah, trik Gauss, rata-rata aritmetika, dan soal cerita, lengkap dengan latihan.
- [Bilangan Biner: Konversi, Operasi, Bit, dan Komplemen Dua](https://nunada.my.id/artikel/bilangan-biner/): Bilangan biner: bit dan nilai tempat, konversi ke desimal dan heksadesimal, aritmetika biner, komplemen dua, operator bitwise, dan pecahan biner.
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- [Bilangan Real: Pengertian, Jenis, Contoh, dan Sifat-sifatnya](https://nunada.my.id/artikel/bilangan-real/): Pengertian bilangan real, jenis (rasional dan irasional), contoh, sifat, dan garis bilangan, lengkap dengan latihan interaktif, pembuktian, dan FAQ.

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