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Year 4 Area and Perimeter Worksheet — Level 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 — Answers

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

1.A rectangle is 10 cm long and 15 cm wide. Find its area.

Answer: 150 cm2

  1. A = length × width = 10 × 15
  2. = 150 cm2
2.A rectangle is 30 m long and 5 m wide. Find its area.

Answer: 150 m2

  1. A = length × width = 30 × 5
  2. = 150 m2
3.An L-shape is made from a 12 cm by 12 cm rectangle joined to a 5 cm by 7 cm rectangle. Find the total area.

Answer: 179 cm2

  1. Rectangle 1: 12 × 12 = 144
  2. Rectangle 2: 5 × 7 = 35
  3. Total: 144 + 35 = 179 cm2
4.An L-shape is made from a 24 mm by 16 mm rectangle joined to a 3 mm by 18 mm rectangle. Find the total area.

Answer: 438 mm2

  1. Rectangle 1: 24 × 16 = 384
  2. Rectangle 2: 3 × 18 = 54
  3. Total: 384 + 54 = 438 mm2
5.A triangle has a base of 18 m and a perpendicular height of 4 m. Find its area.

Answer: 36 m2

  1. A = ½ × base × height = ½ × 18 × 4
  2. = 36 m2
6.A rectangle is 6 mm long and 13 mm wide. Find its area.

Answer: 78 mm2

  1. A = length × width = 6 × 13
  2. = 78 mm2
7.An L-shape is made from a 21 m by 3 m rectangle joined to a 6 m by 7 m rectangle. Find the total area.

Answer: 105 m2

  1. Rectangle 1: 21 × 3 = 63
  2. Rectangle 2: 6 × 7 = 42
  3. Total: 63 + 42 = 105 m2
8.A triangle has a base of 17 m and a perpendicular height of 14 m. Find its area.

Answer: 119 m2

  1. A = ½ × base × height = ½ × 17 × 14
  2. = 119 m2
9.A triangle has a base of 10 cm and a perpendicular height of 11 cm. Find its area.

Answer: 55 cm2

  1. A = ½ × base × height = ½ × 10 × 11
  2. = 55 cm2
10.A triangle has a base of 8 m and a perpendicular height of 13 m. Find its area.

Answer: 52 m2

  1. A = ½ × base × height = ½ × 8 × 13
  2. = 52 m2
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