Answer:
The area of the base of the cylinder (the circle face) is the same as the area of the base of the prism (the triangle face).
Explanation:
The volume of a prism is the area of the base of the prism multiplied by its height.
The volume of a cylinder is the area of the base of the cylinder multiplied by its height.
So because the volumes are both equal, and the heights are both equal
Then the area of the bases should also be equal.