Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
6. Cross Sections of Three-Dimensional Figures
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Exercise 11 Page 443

The plane is parallel to one of the faces of the rectangular prism.

The intersection is a rectangle.

Practice makes perfect
Let's take a look at the given diagram.

The diagram shows the intersection of a plane and a rectangular prism. We want to describe this intersection. The plane is parallel to one of the faces of the prism. As a result, the intersection is similar to this face — the intersection is a rectangle.