FORMULAS FOR PERIMETER, AREA, SURFACE, VOLUME
Edited by J. Gutt-Lehr
Shapes
Formulas
Rectangle
Area = Length X Width
A = lw
Perimeter = 2 X Lengths + 2 X Widths
P = 2l + 2w
Parallelogram
Area = Base X Height
A = bh
Perimeter = add the length of all sides
P = 2a + 2b
Triangle
Area = 1/2 of the base X the height
A = bh
Perimeter = a + b + c
(add the length of the three sides)
Trapezoid
Area = 1/2 of the base X the height
A = ( )h
Perimeter = add lengths of all sides
P = a + b1 + b2 + c
Circle
Radius = the distance from the center
to a point on the circle (r).
Diameter = the distance between two
points on the circle through the center (d
= 2r).
Circumference = the distance around
the circle (C = d = 2r).
(Assume ≈ 3.14)
Area = r2
Rectangular Solid
Volume = Length X Width X Height
V = lwh
Surface = 2lw + 2lh + 2wh
