Answer:
A pyramid is a polyhedron having a polygonal base and triangular sides with a common vertex .
Explanation:
We have to fill the blank to complete the given sentence.
- Polyhedron is a solid in three dimensions figure with flat polygonal faces, straight edges and sharp vertices.
- A polygon is any two dimensional shape formed with straight edges.
- Ptolemy's theory viewed the Earth as the center of the universe known as geocentric .
- A triangle is a two dimensional polygon with three edges.
Thus, polyhedron is the correct answer to fill the blank to complete the sentence.
A pyramid is a polyhedron having a polygonal base and triangular sides with a common vertex .