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Grade 8 Surface Area of Prisms Worksheet with Answers

Grade 8 (US) · Year 9 (UK) · Class 8 (India) · Math

Unit 4: GeometryReview: Area, Surface Area & Circles

Finding the surface area of cubes, rectangular prisms and triangular prisms by adding the areas of all their faces. This free middle school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Surface Area of Prisms

Grade 8 · Math

Score___ / 12

Name

Class

Date

Learning goal: Review: Area, Surface Area & Circles

Directions: Use the pictures to help you. Solve each problem. Show your work, then write your answer in the box.

Example

Find the surface area of a rectangular prism 5 m long, 6 m wide and 5 m high.

Answer: 170 m²

RememberVolume

Rectangular prismV = l × w × hCylinderV = πr²hConeV = ⅓πr²hSphereV = 4⁄3πr³
  1. 1

    A gift box is 7 cm × 5 cm × 8 cm. How much wrapping paper is needed to cover it exactly (no overlap)?

    Show your work
    Answer
  2. 2

    Find the surface area of a cube with edges of 6 in.

    6 in6 in6 in
    Answer
  3. 3

    Find the surface area of a rectangular prism 7 m long, 10 m wide and 8 m high.

    7 m10 m8 m
    Answer
  4. 4

    Find the surface area of a rectangular prism 8 m long, 7 m wide and 12 m high.

    8 m7 m12 m
    Answer
  5. 5

    Find the surface area of a rectangular prism 13 cm long, 10 cm wide and 2 cm high.

    13 cm10 cm2 cm
    Answer
  6. 6

    Find the surface area of a rectangular prism 5 in long, 11 in wide and 7 in high.

    5 in11 in7 in
    Answer
  7. 7

    Find the surface area of a rectangular prism 13 in long, 3 in wide and 7 in high.

    13 in3 in7 in
    Answer
  8. 8

    A gift box is 3 cm × 4 cm × 6 cm. How much wrapping paper is needed to cover it exactly (no overlap)?

    Show your work
    Answer
  9. 9

    Find the surface area of a rectangular prism 4 cm long, 6 cm wide and 4 cm high.

    4 cm6 cm4 cm
    Answer
  10. 10

    A gift box is 4 cm × 8 cm × 6 cm. How much wrapping paper is needed to cover it exactly (no overlap)?

    Show your work
    Answer
  11. 11

    Find the surface area of a rectangular prism 8 m long, 7 m wide and 7 m high.

    8 m7 m7 m
    Answer
  12. 12

    Find the surface area of a cube with edges of 7 cm.

    7 cm7 cm7 cm
    Answer

★ Challenge corner for fast finishers

If a + b = 11 and ab = 3, what is a^2 + b^2?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/math/8/surface_area

Answer key (click to show)
  1. 1.262 cm²
  2. 2.216 in²
  3. 3.412 m²
  4. 4.472 m²
  5. 5.352 cm²
  6. 6.334 in²
  7. 7.302 in²
  8. 8.108 cm²
  9. 9.128 cm²
  10. 10.208 cm²
  11. 11.322 m²
  12. 12.294 cm²
  13. ★115 (challenge corner)

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Guides for teaching Surface Area of Prisms

What Are the Common Core and NGSS Standards? A Parent's GuideWhat learning standards are, how to read a code like 3.NF.A.1 or MS-PS1-2, what each grade covers in Math, English and Science, and how to use them at home.

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