1
Equations for AREA
Square
Rectangle
Triangle
Parallelogram
Trapezoid
Circle
Rhombus
2
Square
A = l x l
3
Rectangle
A = l x w
4
Triangle
A = 1/2 x b x h
5
Parallelogram
A = h x b
6
Trapezoid
A = 1/2 x h x (b1 + b2)
7
Circle
A = pi x r^2
8
Rhombus aka (kite)
A = 1/2 x d1 x d2
9
Equations for VOLUME
Rectangular Prism
Triangular Prism
Cylinder
Cone
Rectangular Pyramid
Sphere
10
Rectangular Prism
V = l x w x h
11
Triangular Prism
V = b x h x l / 2
12
Cylinder
V = pi x r^2 x h
13
Cone
V = pi x r^2 x h / 3
14
Rectangular Pyramid
V = l x w x h / 3
15
Sphere
V = 4/3 x pi x r^3
16
Circumference aka distance around a circle
C = 2 x pi x r = d x pi
d = 2 x r
d=diameter