Math Formulas


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area of a rectangle

Rectangle                                                                                                                                                                 Area Of Rectangles Video
Area of Rectangles
Area = Length X Width
A = lw

Perimeter = 2 X Lengths + 2 X
Widths                                                                                             Video
P = 2(l + w)                                                                                 Area of Rectangles

area of a parallelogram

Area = Base X Height
a = bh                                                                Video

                                                                         Area of a parallelogram

formula for triangle

trapezoid formula


parts of a circle

Area = 1/2 of the base X the height
a = 1/2 bh
Perimeter = a + b + c                                                           Video        
(add the length of the three sides)                           Area of a Triangles

                                                Area of 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)                                                                                                                   

Area of a circle
Circumference of a circle
Diameter of a circle
Radius of a circle

rectangular solid
cylinder formula
formula for pyramid
formula of a cone
formula for sphere

Rectangular Solid( Rectangular prism)Volume = Length X Width X HeightV = lwhSurface area = 2lw + 2lh + 2wh


Volume = Base X Height
Surface = 2b + Ph (b is the
area of the base P is the
perimeter of the base)


pi x square of the radius x height


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 bases

Volume = 1/3 pr2 x height
V= 1/3 pr2h
Surface = pr2 + prs
S = pr2 + prs