## missashleyn 2 years ago Last one for the night! Part A: Name the polyhedron that Tiya will get if she folds up the net. Part B: Is this a regular polyhedron? Using complete sentences, justify your answer.

1. missashleyn

2. Azteck

Part A: rectangular prism.

3. missashleyn

What makes it a rectangular polyhedron? Because the length is longer than the width?

4. Azteck

Part B: A polyhedron is a geometric solid in three dimensions with flat faces and straight edges. All prisms are considered to be polyhedrons. Thus, a rectangular prism is a polyhedron.

5. Azteck

6. Azteck

There's*

7. missashleyn

Was what I said right about part A?

8. missashleyn

And I think part B was asking if it was a regular polyhedron or not haha

9. Azteck

No, it's a polyhedron due to the geometric shape of a rectangular prism. All prism have flat surfaces and straight edges. that's why prisms are considered to be polyhedrons. That's the main characteristic of being a polyhedron.

10. Azteck

All prisms*

11. missashleyn

Thank you! :)

12. jim_thompson5910

For part B, it's a polyhedron, but it's NOT a regular polyhedron. In order for a polyhedron to be a regular polyhedron, all of its faces need to be congruent polygons. Since that's not the case here, it's not a regular polyhedron.

13. Azteck

Ah, @jim_thompson5910 is absolutely correct. I missed that. Thanks for correcting me. @missashleyn, it's not a regular polyhedron for the reasons stated above by @jim_thompson5910