Math Formula
Rectangle:
Area = Length X Width
A = lw

Perimeter = 2 X Lengths + 2 X Width
P = 2(l + w)
Parallelogram
Area = Base X Height
a = bh
Triangle
Area = 1/2 of the base X the height
a = 1/2 bh
Perimeter = a + b + c
(add the length of the three sides)
Trapezoid

Perimeter = area + b1 + b2 + c
P = a + b1 + b2 + c
The distance around the circle is a circumference.
The distance across the circle is the diameter (d). The
radius (r) is the distance from the center to a point on
the circle. (Pi = 3.14)
d = 2r
c =  d   (pi x diameter
or 2

A =   r
(p=3.14)
Rectangular Solid
Volume = Length X Width X
Height
V = lwh
Surface = 2lw + 2lh + 2wh
Prisms
Volume = area of the Base
X Height
v=bh
Cylinder
Volume =
pi x square of the radius x height

Surface =
Pyramid
V = 1/3 bh
b is the area of the base
Surface Area: Add the area of the base to the
sum of the areas of all of the triangular faces.
The areas of the triangular faces will have
different formulas for different shaped bases.
Cones
Volume = 1/3   r   x height
V= 1/3 pr   h
Surface =  r  + prs
S =  r  + prs
=  r  + pr
Sphere
V = 4/3   r
..........................................................................................................................................................................................................................................................................................................................................................................................
.....................................................................................................................................................................................................................................................................................................................................................................................
.....................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................
MathATube.com
MathATube.com
Video math help
Circle
r
2
h
2
2
2
2
r