Question

A plane intersects a prism to form a cross section that is a polygon with five sides. The minimum number of sides that the polygon at the base of the prism must have is?

A.) 2
B.) 4
C.) 7
D.) 3
E.) 5

Answer 1

the answer is 4 for this question

Answer 2

Since the plane if cutting through the prism to make 5 sides, than the original shape needs to have less than 5.
A prism, is a 3D shape, so you can't have a 2 sided shape.

Now you have a choice of 3 or 4 sides.

A 3 sides shape is a triangle, which also can't be cut into a 5 sided prism,
so the answer would need to be 4.
The answer is B