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5th Grade Area and Perimeter Worksheet — Level 3 — Answers

Answer sheet with worked solutions for the 5th Grade area & perimeter worksheet.

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Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Area & Perimeter

5th Grade Area and Perimeter Worksheet — Level 3 — Answers

Write the formula, substitute, then calculate. Include units.

1.An L-shape is made from a 2 mm by 12 mm rectangle joined to a 2 mm by 17 mm rectangle. Find the total area.

Answer: 58 mm2

  1. Rectangle 1: 2 × 12 = 24
  2. Rectangle 2: 2 × 17 = 34
  3. Total: 24 + 34 = 58 mm2
2.A triangle has a base of 15 cm and a height of 5 cm. Find its area.

Answer: 37.5 cm2

  1. A = ½ × base × height = ½ × 15 × 5
  2. = 37.5 cm2
3.An L-shape is made from a 3 mm by 12 mm rectangle joined to a 2 mm by 15 mm rectangle. Find the total area.

Answer: 66 mm2

  1. Rectangle 1: 3 × 12 = 36
  2. Rectangle 2: 2 × 15 = 30
  3. Total: 36 + 30 = 66 mm2
4.A rectangle is 18 cm long and 13 cm wide. Find its area.

Answer: 234 cm2

  1. A = length × width = 18 × 13
  2. = 234 cm2
5.An L-shape is made from a 27 cm by 13 cm rectangle joined to a 11 cm by 8 cm rectangle. Find the total area.

Answer: 439 cm2

  1. Rectangle 1: 27 × 13 = 351
  2. Rectangle 2: 11 × 8 = 88
  3. Total: 351 + 88 = 439 cm2
6.An L-shape is made from a 8 mm by 17 mm rectangle joined to a 6 mm by 15 mm rectangle. Find the total area.

Answer: 226 mm2

  1. Rectangle 1: 8 × 17 = 136
  2. Rectangle 2: 6 × 15 = 90
  3. Total: 136 + 90 = 226 mm2
7.An L-shape is made from a 21 m by 16 m rectangle joined to a 13 m by 5 m rectangle. Find the total area.

Answer: 401 m2

  1. Rectangle 1: 21 × 16 = 336
  2. Rectangle 2: 13 × 5 = 65
  3. Total: 336 + 65 = 401 m2
8.A rectangle is 12 cm long and 20 cm wide. Find its area.

Answer: 240 cm2

  1. A = length × width = 12 × 20
  2. = 240 cm2
9.A triangle has a base of 10 m and a height of 13 m. Find its area.

Answer: 65 m2

  1. A = ½ × base × height = ½ × 10 × 13
  2. = 65 m2
10.An L-shape is made from a 11 cm by 14 cm rectangle joined to a 8 cm by 8 cm rectangle. Find the total area.

Answer: 218 cm2

  1. Rectangle 1: 11 × 14 = 154
  2. Rectangle 2: 8 × 8 = 64
  3. Total: 154 + 64 = 218 cm2
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