Investigating Volume

The volume of a rectangular prism is equal to the number of unit cubes that make up the prism. Each unit cube has a volume of 1 cubic unit.

Step 1 Count the number of unit cubes in the bottom layer of the prism. There are unit cubes that make up the length of the first layer. There are unit cubes that make up the width of the first layer. There is unit cube that makes up the height of the first layer. So, altogether, there are unit cubes that make up the bottom layer of the prism.

Step 2 Count the number of layers of cubes that make up the prism. The prism is made up of layers of unit cubes.


Step 3 Find the total number of cubes that fill the prism. Multiply the number of layers by the number of cubes in each layer. 3 3 8 5 unit cubes Each unit cube has a volume of 1 cubic inch. So, the volume of the prism is 24 3 1, or cubic inches.


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