Digits, Grade 7, Volume 1, Homework Helper

### 5-2: TEKS Practice

• 1. Find the surface area of the prism. • 2. Find the surface area of the cube. Simplify your answer. • 3. Think About the Process • a. Which formula can you use to find the area of one triangular face?

• A. A = b − h

• B. eh equals , 1 half , b h

• C. A = bh

• D. eh equals , 1 third , b h

• b. The surface area of the prism is square units.

• 4. Gift Wrapping A gift box has the shape of a rectangular prism. How much wrapping paper do you need to cover the box? • 5. Think About the Process • a. Which equation could you use to help you find the surface area?

• A. Surface area = 63 + 36 + 28

• B. Surface area = 2(63 + 36 + 28)

• C. Surface area = 2(63) + 36 + 28

• b. The surface area of the prism is square units.

• 6. The triangular faces of the prism shown are equilateral triangles with perimeter 24 cm. Use a net to find the surface area of the prism. • 7. Writing A patio is made up of stones shaped like the figure. • a. Find the surface area of one stone.

• b. How does a net help you find the surface area?

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