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Rectangle
Area = Length X Width
A = lw

Perimeter = 2 X Lengths + 2 X
Widths
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 = a + 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 = 2x pi x r
A = pr
Rectangular Solid( Rectangular prism)
Volume = Length X Width X Height
V = lwh
Surface area = 2lw + 2lh + 2wh
Prisms
Volume = Base X Height
v=bh
Surface = 2b + Ph (b is the
area of the base P is the
perimeter of the base)
Surface area
Pyramid
V = 1/3 bh (1/3 x area of the base x height

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 base
s.
Cones
Volume = 1/3 pr2 x height
V= 1/3 pr2h
Surface = pr2 + prs
S = pr2 + prs
=pr2 + pr
Math Formulas
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Circle
Video
Video
Video
Video
Videos
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Cylinder
pi x square of the radius x height
2
Sphere