Answer:B. Pyramids have triangular faces and a polygonal base.
Explanation:
A pyramid is a three-dimensional shape that has a polygonal base and triangular faces that meet at a single point called the apex. Here's how to identify which of the given descriptions best suits a pyramid:
A. Pyramids have polygonal faces and a triangular base.
This description is incorrect because pyramids have a polygonal base, not a triangular base.
B. Pyramids have triangular faces and a polygonal base.
This description is correct because it correctly identifies that pyramids have triangular faces and a polygonal (meaning multi-sided) base.
C. Pyramids have triangular faces and a circular base.
This description is incorrect because pyramids have a polygonal base, not a circular base.
D. Pyramids have polygonal faces and a polygonal base.
This description is partly correct because pyramids do have a polygonal base, but their faces are always triangular.
E. Pyramids have curved faces and a polygonal base.
This description is incorrect because pyramids have flat, triangular faces, not curved faces.
So, in summary, option B, "Pyramids have triangular faces and a polygonal base," is the description that best suits a pyramid.