Question

May you check my answers?
I got B for both questions.
@phi

Answer 1

the first problem has a triangle with Area = 600 and a height of 20, and we need to find the base.

A= ½ B * H
600= ½ * B * 20
600 = 10 * B
B= 600/10 = 60

so choice B

Answer 2

the Q9, some of the faces are triangles, but the bottom (also a "face") is a square.
so it is a non-regular polyhedron because all of its faces are not the same