Big Ideas Math: Modeling Real Life, Grade 8
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Big Ideas Math: Modeling Real Life, Grade 8 View details
4. Surface Areas and Volumes of Similar Solids
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Exercise 8 Page 450

Similar solids are solids that have the same shape and proportional corresponding dimensions.

No

Practice makes perfect
We are given the diagram of two rectangular prisms, where we can see their dimensions.
cones

We want to know if these two solids are similar. Similar solids have the same shape and proportional corresponding dimensions. Therefore, to determine whether the rectangular prisms are similar, we will calculate the ratio between corresponding lengths.

Ratio Substitute Simplify
Length of bigger prism/Length of small prism 4/2 2
Width of bigger prism/Width of small prism 2/1 2
Height of bigger prism/Height of small prism 4/4 1

The ratios between corresponding dimensions are not the same. Therefore, the rectangular prisms are not similar.