Lesson 13
Polyhedra
Problem 1
Select all the polyhedra.
![Figure A rectangular pyramid. Figure B many sided polyhedron. Figure C cone. Figure D Prism with hexagon faces. Figure E sphere.](https://cms-im.s3.amazonaws.com/w5KuSmm66D7KoaNLVa24nM9C?response-content-disposition=inline%3B%20filename%3D%226-6.1.E.PP_Image_2.png%22%3B%20filename%2A%3DUTF-8%27%276-6.1.E.PP_Image_2.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240727%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240727T003458Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=c741792a008c0ac3858950a34aad2474586eea652e38388401ddffdd7cc3d3ef)
A
B
C
D
E
Solution
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Problem 2
-
Is this polyhedron a prism, a pyramid, or neither? Explain how you know.
- How many faces, edges, and vertices does it have?
Solution
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Problem 3
Tyler said this net cannot be a net for a square prism because not all the faces are squares.
Do you agree with Tyler? Explain your reasoning.
![net. 4 adjacent rectangles. Square above rectangle 2 and beow rectangle 1.](https://cms-im.s3.amazonaws.com/qPD7z53XdqsNQyqVdhQ11nRp?response-content-disposition=inline%3B%20filename%3D%226-6.1.E.PP.New.Image.11.png%22%3B%20filename%2A%3DUTF-8%27%276-6.1.E.PP.New.Image.11.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240727%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240727T003458Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=44adbd4becd3eeedae9e19cfd13fa6409ab3b6edaa584a37e4d4dc77e8e7aa04)
Solution
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Problem 4
Explain why each of these triangles has an area of 9 square units.
![Three triangles labeled A, B, and, C. Each triangle has a bas of 6 units and a height of 3 units.](https://cms-im.s3.amazonaws.com/NQepdH7puEBLUkSc2JZToGG5?response-content-disposition=inline%3B%20filename%3D%226-6.1.C.PP.New.Image.08.png%22%3B%20filename%2A%3DUTF-8%27%276-6.1.C.PP.New.Image.08.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240727%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240727T003458Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=e184c663c5a32bbb6f94d3c323bde4aef0ecf0eddeb444fdd7ef63aa96bbc604)
Solution
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(From Unit 1, Lesson 8.)Problem 5
-
A parallelogram has a base of 12 meters and a height of 1.5 meters. What is its area?
- A triangle has a base of 16 inches and a height of \(\frac18\) inches. What is its area?
- A parallelogram has an area of 28 square feet and a height of 4 feet. What is its base?
- A triangle has an area of 32 square millimeters and a base of 8 millimeters. What is its height?
Solution
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(From Unit 1, Lesson 9.)Problem 6
Find the area of the shaded region. Show or explain your reasoning.
![Triangle shaded with a unshaded square located in the middle on the bottom.](https://cms-im.s3.amazonaws.com/J1qEMcijroqnTp77iHX5Z1ZH?response-content-disposition=inline%3B%20filename%3D%226-6.1.A.PP_Image_17.png%22%3B%20filename%2A%3DUTF-8%27%276-6.1.A.PP_Image_17.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240727%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240727T003458Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=73f9fd639a9f6412b74030b591768770be4fb92efd4dd82d27e0ccdc88bc2461)
Solution
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(From Unit 1, Lesson 3.)