5-1: TEKS Practice

  • 1. Find the surface area of the prism.

    A rectangular prism with height 14 inches and base 5 inches by 6 inches.

  • 2. Gift Wrapping A gift box has the shape of a rectangular prism. How much wrapping paper do you need to cover the box?

    A gift box with height 3 inches and base 15 inches by 16 inches.

  • 3. A block of wood has the shape of a triangular prism. The bases are right triangles. Find its surface area.

    A block of wood with height 15 inches. The base is a right triangle with sides 4.5 inches, 6 inches, and 7.5 inches.

  • 4. Find the surface area of the triangular prism. The base of the prism is an isosceles triangle.

    A triangular prism with height 44 cm. The base is an isosceles triangle with base 24 cm, legs 37 cm, and height 35 cm.

  • 5. Find the lateral area of the triangular prism.

    A triangular prism with height 11.2 m. The base is a triangle with sides 6.7 m, 8.3 m, and 10.3 m.

  • 6. Multiple Representations The figure is not to scale.

    A rectangular prism with height 17 cm and base 13 cm by 18 cm.

    • a. Find the surface area of the rectangular prism.

    • b. Use pencil, paper, and a ruler. Draw a net for the prism that is to scale. Then draw a more accurate sketch of the prism.

  • 7. Open-Ended Design your own backyard shed in the shape of a cube. Choose exact dimensions for your shed. Find the lateral area and surface area of the cube on which you based your design. Then find the ratio of its lateral area to its surface area. The ratio in simplest form is :.

  • 8. Sculpture An artist wants to make a hollow metal sculpture in the shape of a rectangular prism, not including the bases at the top and bottom. The sculpture is to be 20.3 cm long, 20.1 cm wide, and 39.5 tall. How much metal does the artist need to make the sculpture?


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Table of Contents

Digits, Grade 8, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Proportionality Unit C: Expressions, Equations, and Relationships English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties