##### Geometry

Height of a triangle

Area of a triangle

Law of Cosines

Pythagorean Theorem

Height of an Equilateral Triangle

Area of an Eq. Triangle

Area of a parallelogram

bh

Area of a trapezoid

Area of a Circle

Circumference of a circle

2πr

Area of a sector of a circle

Sector of a circle:

s =

rθ

Area of a circular ring

Area of a sector of a circular ring

θpw

Area of an ellipse

πab

Circumference of an ellipse

Volume of a cone

Volume of a right circular cone

Lateral surface area of a right circular cone

Volume of the frustum of a right circular cone

Lateral surface area of the frustum of a right circular cone

Volume of a right circular cylinder

Lateral surface area of a right circular cylinder

Volume of a sphere

Surface area of a sphere

(A = area of upper face, B = area of base)

For a wedge:

A =