Math

Math Area and perimeter formulas Square, rectangle, circle, triangle: the area and perimeter formulas for the most common shapes. Free Math Volume formulas Cube, cylinder, sphere, cone: the volume formulas for the most common solids, ready to use. Free Math Essential trigonometric identities Sine, cosine, tangent, the unit circle: the identities and reference values you need for trigonometry. Premium Math Percentages: everyday calculations Calculating a discount, a price increase, a % change: the everyday percentage formulas, without getting them wrong. Free Math Exponents and roots: calculation rules aⁿ, square roots, negative exponents: the calculation rules for exponents and roots, with worked examples for each. Free Math Basic statistics: mean, median, standard deviation Mean, median, mode, standard deviation: the basic statistical indicators for summarising a dataset, with their formulas. Free Math Arithmetic and geometric sequences Common difference, general term, sum of terms: the basic formulas for arithmetic and geometric sequences. Free Math Solving linear and quadratic equations ax + b = 0, the discriminant, the quadratic formula: how to solve a linear or quadratic equation, step by step. Free Math Probability: the basics Probability, independent events, conditional probability: the basics of probability calculations with concrete examples. Premium Math Simple and compound interest formulas The base formulas for growing a balance with simple or compound interest, and the difference between them. Premium Math Number base conversion: binary, decimal, hexadecimal How to convert between bases, and why binary and hexadecimal are everywhere in computing. Free Math The metric system and unit prefixes (milli, kilo, mega…) Metric system prefixes, from nano to giga, and how to quickly convert between them. Free