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4th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 3 — Answers

Answer sheet with worked solutions for the 4th Grade area & perimeter worksheet.

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Success TutoringWorksheetsAnswer sheet4th Grade · Mathematics · Area & Perimeter

4th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 3 — Answers

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

1.An L-shape is made from a 29 mm by 8 mm rectangle joined to a 21 mm by 7 mm rectangle. Find the total area.

Answer: 379 mm2

  1. Rectangle 1: 29 × 8 = 232
  2. Rectangle 2: 21 × 7 = 147
  3. Total: 232 + 147 = 379 mm2
2.A triangle has a base of 12 mm and a height of 6 mm. Find its area.

Answer: 36 mm2

  1. A = ½ × base × height = ½ × 12 × 6
  2. = 36 mm2
3.An L-shape is made from a 28 cm by 2 cm rectangle joined to a 8 cm by 4 cm rectangle. Find the total area.

Answer: 88 cm2

  1. Rectangle 1: 28 × 2 = 56
  2. Rectangle 2: 8 × 4 = 32
  3. Total: 56 + 32 = 88 cm2
4.An L-shape is made from a 15 cm by 16 cm rectangle joined to a 9 cm by 19 cm rectangle. Find the total area.

Answer: 411 cm2

  1. Rectangle 1: 15 × 16 = 240
  2. Rectangle 2: 9 × 19 = 171
  3. Total: 240 + 171 = 411 cm2
5.An L-shape is made from a 18 cm by 18 cm rectangle joined to a 10 cm by 10 cm rectangle. Find the total area.

Answer: 424 cm2

  1. Rectangle 1: 18 × 18 = 324
  2. Rectangle 2: 10 × 10 = 100
  3. Total: 324 + 100 = 424 cm2
6.A triangle has a base of 14 cm and a height of 9 cm. Find its area.

Answer: 63 cm2

  1. A = ½ × base × height = ½ × 14 × 9
  2. = 63 cm2
7.A triangle has a base of 13 m and a height of 6 m. Find its area.

Answer: 39 m2

  1. A = ½ × base × height = ½ × 13 × 6
  2. = 39 m2
8.A rectangle is 24 cm long and 6 cm wide. Find its area.

Answer: 144 cm2

  1. A = length × width = 24 × 6
  2. = 144 cm2
9.An L-shape is made from a 11 mm by 20 mm rectangle joined to a 3 mm by 3 mm rectangle. Find the total area.

Answer: 229 mm2

  1. Rectangle 1: 11 × 20 = 220
  2. Rectangle 2: 3 × 3 = 9
  3. Total: 220 + 9 = 229 mm2
10.A rectangle is 12 cm long and 2 cm wide. Find its area.

Answer: 24 cm2

  1. A = length × width = 12 × 2
  2. = 24 cm2
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