Area

Square		a x a or (a2)
Rectangle		a x b
Triangle		½ x b x h
Circle		Pi x r2
Parallelogram		b x h
Ellipse		Pi x r1 x r2
Trapezoid		½ x h x (b1 + b2)

 

Volume

Cube		a x a x a or (a3)
Rectangle Prism		a x b x c
Cylinder		Pi x r2 x h
Pyramid		1/3 x b x h
Cone		1/3 x Pi x r2 x h
Sphere		4/3 x Pi x r3

 

Note 1: Pi = 3.1415926

Note 2: use the same units for all measurements, i.e. either metre or yard