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MathMentor

Learn with Mentor · 8 min

Parts of Three-Dimensional Figures

Count faces, edges, and vertices for prisms and pyramids from an n-sided base description.

Let's start

What are we counting?

These questions describe a prism or pyramid in words, such as a 14-sided prism or a 20-sided pyramid. Your job is to count one part of the solid: faces, edges, or vertices.