Question

Nguyen makes two slices through a three-dimensional object. One plane is parallel to the base; the cross-section is a square. The other plane is perpendicular to the base; the cross-section is a triangle. What three-dimensional shape did Nguyen cut?

Answer 1

Nguyen cut a pyramid.

Step-by-step explanation:

The three-dimensional shape that Nguyen cut is a pyramid.

When a plane parallel to the base of a pyramid cuts through it, the resulting cross-section is a square. The base of the pyramid is also a square.

When a plane perpendicular to the base of a pyramid cuts through it, the resulting cross-section is a triangle. This cross-section represents one of the faces of the pyramid.