Geometry Formulas Reference

Complete collection of geometry formulas for area, perimeter, volume, and more with clear explanations and examples

45+ FormulasWith ExamplesPrintable Reference

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Quick Formula Reference

Triangle Area

A = ½ × base × height

Circle Area

A = π × r²

Rectangle Area

A = length × width

Circle Circumference

C = 2π × r

Formula Categories

Browse formulas by category or shape type

15+ FormulasAll Levels

Area Formulas

Complete collection of area formulas for all geometric shapes with examples and applications

Includes:

Triangle AreaCircle AreaRectangle AreaPolygon AreaTrapezoid Area

12+ FormulasAll Levels

Perimeter Formulas

Essential perimeter and circumference formulas for measuring shape boundaries

Includes:

Triangle PerimeterCircle CircumferenceRectangle PerimeterPolygon Perimeter

10+ FormulasIntermediate

Volume Formulas

3D volume formulas for cubes, spheres, cylinders, pyramids, and complex shapes

Includes:

Cube VolumeSphere VolumeCylinder VolumePyramid VolumeCone Volume

8+ FormulasAll Levels

Triangle Formulas

Comprehensive triangle formulas for area, perimeter, angles, and special properties

Includes:

Heron's FormulaSAS AreaPythagorean TheoremLaw of Cosines

15+ FormulasIntermediate

Triangle Solving Formulas

Complete reference for sine law, cosine law, and triangle area formulas with solving methods and applications

Includes:

Sine LawCosine LawTriangle AreaSpecial CasesSolving Methods

10+ IdentitiesIntermediate

Trigonometry Formulas

Induction (reduction) rules for sin, cos, and tan using ±α + k·π/2 with quadrant signs

Includes:

sin reductionscos reductionsquadrant sign rulesodd/even name rule

20+ FormulasIntermediate

Trigonometry Identity Transformations

Double angle, half angle, sum-to-product, product-to-sum, and triple angle formulas

Includes:

double anglehalf anglepower reductionsum-to-producttriple angle

12+ FormulasIntermediate

Sum & Difference Identities

Addition and subtraction formulas for sine, cosine, and tangent with auxiliary angle transformations

Includes:

addition formulassubtraction formulasauxiliary angleexact values

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