AnswersMath 7 B M12 2526 S2Surface Area of Composite Figures

Surface Area of Composite Figures Answers

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3

What is the total surface area of the solid?

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A
558 square centimeters
B
702 square centimeters
C
842 square centimeters
D
982 square centimeters
4

What is the surface area of the composite solid?

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A
1,508 m2
B
1,658 m2
C
1,808 m2
D
1,958 m2
5

Which statement is true about the composite solid?

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A
The solid has a total of 9 faces.
B
There are the same number of triangular faces as there are rectangular faces.
C
The solid is formed by joining a rectangular pyramid and a triangular prism at a common face.
D
If all of the triangular faces are congruent, then all of the rectangular faces must be congruent as well.
6

Kayla’s work to find the surface area of a composite solid formed when a rectangular prism and rectangular pyramid are joined at their bases is shown below. SA = square unitsWhat statement best describes Kayla’s error?

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A
She used the wrong expression for the lateral faces of the solid. She should have simplified .
Option A
B
She left out one of faces of the solid. She should have simplified .
Option B
C
She used the wrong expression for the lateral faces of the solid and left out the base of the figure. She should have simplified .
Option C
D
She included the face where the pyramid and prism are joined together. She should have simplified .
Option D
7

Joylin must stack 3 blocks identical to the one shown below.What strategy for stacking the blocks will produce a stack with the least surface area?

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A
Create a stack where the 5-inch-by-6-inch faces of the blocks touch.
B
Create a stack where the 5-inch-by-8-inch faces of the blocks touch.
C
Create a stack where the 6-inch-by-8-inch faces of the blocks touch.
D
Create a stack where two different-sized faces of the blocks touch.
9

Which statement best describes the faces that make up the total surface area of this composite solid?

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A
9 faces, 5 rectangles, and 4 triangles
B
9 faces, 7 rectangles, and 2 triangles
C
11 faces, 7 rectangles, and 4 triangles
D
11 faces, 9 rectangles, and 2 triangles

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