Digits, Grade 7, Volume 1, Homework Helper

5-2: TEKS Practice

  • 1. Find the surface area of the prism.

    A rectangular prism of length 7 in., width 4 in., and height 15 in.

  • 2. Find the surface area of the cube. Simplify your answer.

    A cube with edges of length ¼ in.

  • 3. Think About the Process

    A triangular prism of height 6. The top and bottom bases are each right triangles with a hypotenuse length 13 and legs length 12 and length 5.

    • 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?

    A rectangular prism of length 16 in., width 15 in., and height 3 in.

  • 5. Think About the Process

    A rectangular prism of length 7, width 4, and height 9.

    • 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.

    A triangular prism of height 10 cm. Each triangular base has height 6.9 cm.

  • 7. Writing A patio is made up of stones shaped like the figure.

    A rectangular prism of length 29 cm, width 29 cm, and height 3.7 cm.

    • a. Find the surface area of one stone.

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


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Table of Contents

Digits, Grade 7, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Expressions, Equations, and Relationships Unit C: Measurement and Geometry Unit D: Proportionality English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties