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Lesson 1: Geometric solids (3D shapes)

# Counting faces and edges of 3D shapes

Learn about shapes! Discover how to count faces and edges on 3D figures. We explore a transparent shape with five faces and another shape, a square pyramid, with eight edges and five faces. It's a colorful journey into geometry!

## Want to join the conversation?

• are vertices the same as edges
• No, vertices are like corners where three faces meet, with the exception of the apex, in which 4 or more faces meet in a pyramid.
• how can i identify faces and edges of a sphere? maybe its silly to ask but i am curious.
• A face is a flat surface on a solid, and edges are the lines at which faces meet, and a vertex is the point at which when three or more edges meet. A sphere has no flat surfaces, so it has no faces. Since it doesn't have faces, it can't have edges, or vertices.
• Is cylinder a prism? Is cone a pyramid?
• no because all of the faces of prisms and pyramids have to be polygons.
• can a 3d shape have 4 faces?
• Yes it can have 4 faces. I am pretty sure I am correct.
(1 vote)
• So this video really made me better.
• hey sister what is angle
(1 vote)
• Hey! (Credit to Dictionary.com) An angle is a geometric figure formed by two lines that begin at a common point or by two planes that begin at a common line.
• are vertices the same as edges
• No, vertices are not the same as edges.
(1 vote)
• what would a 4-D shape look like?