Answer:
If all the sides of the solid are flat, then it is said to be a polyhedron
Explanation:
Given: a polyhedron
To find: attributes of a solid figure to classify it as a polyhedron
Solution:
A polyhedron is a three-dimensional figure with flat faces as polygons. It has straight edges and sharp vertices. It is made by joining polygons together.
If all the sides of the solid are flat, then it is said to be a polyhedron but if the solid has at least one curved side, then it is not a polyhedron.