Question

all cross - sectional shapes that are parallel or perpendicular to one of the bases of a ____ are also congruent to one another.
a. polygon
b. cube
c. pyramid
d. prism

Explanation:

A polygon is a 2 - D shape, not a 3 - D shape with bases for cross - sections. In a cube, cross - sections parallel to the bases are congruent squares, but cross - sections perpendicular to the bases are not always congruent to the bases. In a pyramid, cross - sections parallel or perpendicular to the base are not congruent to each other in general. In a prism, all cross - sectional shapes that are parallel to one of the bases are congruent to the bases and to each other, and cross - sections perpendicular to the bases are also congruent to one another in a regular sense.

Answer:

D. prism