Learning Resources LER 7630

Hexagonal Prism

Volumehexagonalprism =AxH

Identify the variables:

A = Area of the hexagonal base

H = Height of the prism

Explain that the area for a hexagon is

calculated as follows:

A= w x3/2s

Identify the variables:

w = Width of hexagon as shown

s = Length of side

Cylinder

Volumecylinder=AxH

= (π r2)xH

Pyramid

Introduce the general formula for finding the volume of a pyramid:

Volumepyramid=1/3AxH

Ask students to identify the difference between this general formula and the

one for the prism. (There is one more variable: 1/3.) If students remember a

volume formula for a prism, it is easy to remember the volume formula for a

pyramid with the same-size base and height: simply multiply by 1/3.You can

demonstrate this concept by pouring

three filled pyramids into the

corresponding prism in the Power

Solid set.

Square Pyramid

Volumesquarepyramid =1/3AxH

=1/3(s xs) xH