Cross Sections and Number of Faces, Edges, and Vertices

The lines of a 3D shape are called...

• edges

• outside

• faces

• vertices

How many faces does the shape below have?

• 2

• 4

• 6

• 8

Number of Faces?

• 7

• 5

• 4

• 15

Number of Edges?

• 7

• 5

• 10

• 15

Number of Vertices?

• 7

• 5

• 10

• 15

How many edges on a cylinder...

• 3

• 2

• 0

• 1

The point where two or more edges intersect on an object.

• base

• face 

• vertex

• edge

A polyhedron having 6 vertices and 9 edges will have ________faces

• 4

• 6

• 2

• 5

A polyhedron has 6 faces and 7 vertices. How many edges does it have?

Use Euler’s Theorem to calculate how many faces a polyhedron has if it has 6 edges and 4 vertices.