Area and perimeter of a square
P=5+5+5+5
A=5 to the 2nd power
perimeter of a rectangle and area of rectangle
P=2L+2W
A=LxW
parallelogram area and perimeter
P=
A=BxH
Triangle area and perimeter
P=
A=1/2 BxH
circumference of a circle
C=2 x pi
Ac=pi x Rsquared