Reasoning

Shape and Space - Always, Sometimes, or Never? Prove It

Always, Sometimes, or Never? Let’s Prove It

Below are some mathematical statements about 3-D shapes. For each statement, decide if it is: Always true, Sometimes true or Never true. In your group, you must:

01

Agree on a decision

02

Explain how you know

03

Use: examples, non-examples, drawing or diagrams

Statements

A cuboid has two square faces.

The number of vertices in a 3-D shape is the same as the number of its faces.
A football is a polyhedron.

Be ready to share and defend your reasoning.

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