Math Formulas
Printable view
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
Parallelogram
Area = Base X Height
a = bh Video
Circle
Triangle
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
Trapezoid
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( Rectangular prism)Volume = Length X Width X HeightV = lwhSurface 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)
pi x square of the radius x height
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 bases
Cones
Volume = 1/3 pr2 x height
V= 1/3 pr2h
Surface = pr2 + prs
S = pr2 + prs
Sphere