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Math Formula Encyclopedia

Search, understand, and use formulas across arithmetic, algebra, geometry, trigonometry, calculus, statistics, finance, science, engineering, and everyday math.

134 formulas10 subjectsExamples + variables

28 matching formulas

Geometry

Rectangle Area

A = lw

Area enclosed by a rectangle.

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Geometry

Rectangle Perimeter

P = 2(l+w)

Distance around a rectangle.

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Geometry

Square Area

A = s²

Area of a square.

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Geometry

Square Perimeter

P = 4s

Distance around a square.

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Geometry

Triangle Area

A = ½bh

Area of a triangle.

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Geometry

Heron’s Formula

A = √(s(s−a)(s−b)(s−c))

Area of a triangle from three side lengths.

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Geometry

Pythagorean Theorem

c² = a² + b²

Relates side lengths of a right triangle.

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Geometry

Circle Circumference

C = 2πr

Distance around a circle.

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Geometry

Circle Area

A = πr²

Area enclosed by a circle.

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Geometry

Arc Length

L = rθ

Length of a circular arc.

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Geometry

Sector Area

A = ½r²θ

Area of a circular sector.

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Geometry

Trapezoid Area

A = ½(a+b)h

Area of a trapezoid.

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Geometry

Parallelogram Area

A = bh

Area of a parallelogram.

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Geometry

Rhombus Area

A = ½d₁d₂

Area of a rhombus from diagonals.

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Geometry

Ellipse Area

A = πab

Area enclosed by an ellipse.

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Geometry

Cube Volume

V = s³

Volume of a cube.

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Geometry

Rectangular Prism Volume

V = lwh

Volume of a rectangular prism.

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Geometry

Cylinder Volume

V = πr²h

Volume of a right circular cylinder.

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Geometry

Cone Volume

V = (1/3)πr²h

Volume of a cone.

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Geometry

Sphere Volume

V = (4/3)πr³

Volume of a sphere.

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Geometry

Sphere Surface Area

S = 4πr²

Surface area of a sphere.

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Geometry

Distance Between Two Points

d = √((x₂−x₁)²+(y₂−y₁)²)

Euclidean distance in a plane.

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Geometry

Midpoint

M = ((x₁+x₂)/2,(y₁+y₂)/2)

Coordinates halfway between two points.

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Geometry

Regular Polygon Interior Angle Sum

S=(n−2)×180°

Common reference identity or relationship used in geometry.

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Geometry

Regular Polygon Interior Angle

A=((n−2)×180°)/n

Common reference identity or relationship used in geometry.

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Geometry

Regular Polygon Exterior Angle

E=360°/n

Common reference identity or relationship used in geometry.

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Geometry

Prism Volume

V=Bh

Common reference identity or relationship used in geometry.

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Geometry

Pyramid Volume

V=(1/3)Bh

Common reference identity or relationship used in geometry.

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