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Year 4 Area and Perimeter Worksheet — Level 3 — Practice Set 3 — Answers

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

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Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · Area & Perimeter

Year 4 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 18 m by 7 m rectangle joined to a 2 m by 12 m rectangle. Find the total area.

Answer: 150 m2

  1. Rectangle 1: 18 × 7 = 126
  2. Rectangle 2: 2 × 12 = 24
  3. Total: 126 + 24 = 150 m2
2.An L-shape is made from a 16 mm by 10 mm rectangle joined to a 2 mm by 9 mm rectangle. Find the total area.

Answer: 178 mm2

  1. Rectangle 1: 16 × 10 = 160
  2. Rectangle 2: 2 × 9 = 18
  3. Total: 160 + 18 = 178 mm2
3.A rectangle is 22 mm long and 20 mm wide. Find its area.

Answer: 440 mm2

  1. A = length × width = 22 × 20
  2. = 440 mm2
4.A rectangle is 10 m long and 14 m wide. Find its area.

Answer: 140 m2

  1. A = length × width = 10 × 14
  2. = 140 m2
5.A triangle has a base of 10 mm and a perpendicular height of 4 mm. Find its area.

Answer: 20 mm2

  1. A = ½ × base × height = ½ × 10 × 4
  2. = 20 mm2
6.A rectangle is 25 cm long and 10 cm wide. Find its area.

Answer: 250 cm2

  1. A = length × width = 25 × 10
  2. = 250 cm2
7.An L-shape is made from a 5 mm by 5 mm rectangle joined to a 2 mm by 4 mm rectangle. Find the total area.

Answer: 33 mm2

  1. Rectangle 1: 5 × 5 = 25
  2. Rectangle 2: 2 × 4 = 8
  3. Total: 25 + 8 = 33 mm2
8.An L-shape is made from a 8 m by 6 m rectangle joined to a 7 m by 10 m rectangle. Find the total area.

Answer: 118 m2

  1. Rectangle 1: 8 × 6 = 48
  2. Rectangle 2: 7 × 10 = 70
  3. Total: 48 + 70 = 118 m2
9.A triangle has a base of 19 mm and a perpendicular height of 11 mm. Find its area.

Answer: 104.5 mm2

  1. A = ½ × base × height = ½ × 19 × 11
  2. = 104.5 mm2
10.An L-shape is made from a 3 mm by 13 mm rectangle joined to a 2 mm by 5 mm rectangle. Find the total area.

Answer: 49 mm2

  1. Rectangle 1: 3 × 13 = 39
  2. Rectangle 2: 2 × 5 = 10
  3. Total: 39 + 10 = 49 mm2
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