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 15 Page 443

The plane is parallel to one of the bases of the cylinder.

The intersection is a circle.

Practice makes perfect
Let's take a look at the given diagram.
Intersection of a plane and a cylinder

The diagram shows an intersection of a plane and a cylinder. We want to describe this intersection. The plane is parallel to the base of the cylinder. As a result, the cross section is similar to the base — the cross section is a circle.