Rectangle
A=Length Times Width
A=lw
Parallelogram
A=bottom times height
A=bh
Square
A=side times side
A=s Squared
Trapazoid
A=bottom 1 plus bottom 2 divided by 2 times height
A=b1 + b2 divided by 2 times h
Triangle
A=bottom times height divided by 2
A=1/2bh
Circle
A=pie times radius squared
A=3.14r squared
Semi Circle
A=pie times radius squared divided by 2
A=3.14r squared divided by 2
Circumference of a Circle
C=3.14D
Circumference of a Semi Circle
C=3.14D divided by 2 + D
Rectangular Prism
Volume=Length times width times height
Triangular Prism
Volume=Bottom times Height times slanted L divided by 2
Pyramid
Volume=Length times width times height divided by 3