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Year 9 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers

Answer sheet with worked solutions for the Year 9 area & perimeter worksheet.

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Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Area & Perimeter

Year 9 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers

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

1.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
2.A triangle has a base of 11 cm and a perpendicular height of 7 cm. Find its area.

Answer: 38.5 cm2

  1. A = ½ × base × height = ½ × 11 × 7
  2. = 38.5 cm2
3.An L-shape is made from a 2 cm by 4 cm rectangle joined to a 2 cm by 9 cm rectangle. Find the total area.

Answer: 26 cm2

  1. Rectangle 1: 2 × 4 = 8
  2. Rectangle 2: 2 × 9 = 18
  3. Total: 8 + 18 = 26 cm2
4.An L-shape is made from a 26 m by 5 m rectangle joined to a 21 m by 6 m rectangle. Find the total area.

Answer: 256 m2

  1. Rectangle 1: 26 × 5 = 130
  2. Rectangle 2: 21 × 6 = 126
  3. Total: 130 + 126 = 256 m2
5.A triangle has a base of 12 cm and a perpendicular height of 11 cm. Find its area.

Answer: 66 cm2

  1. A = ½ × base × height = ½ × 12 × 11
  2. = 66 cm2
6.A rectangle is 7 m long and 19 m wide. Find its area.

Answer: 133 m2

  1. A = length × width = 7 × 19
  2. = 133 m2
7.An L-shape is made from a 22 mm by 6 mm rectangle joined to a 2 mm by 11 mm rectangle. Find the total area.

Answer: 154 mm2

  1. Rectangle 1: 22 × 6 = 132
  2. Rectangle 2: 2 × 11 = 22
  3. Total: 132 + 22 = 154 mm2
8.An L-shape is made from a 17 cm by 12 cm rectangle joined to a 12 cm by 6 cm rectangle. Find the total area.

Answer: 276 cm2

  1. Rectangle 1: 17 × 12 = 204
  2. Rectangle 2: 12 × 6 = 72
  3. Total: 204 + 72 = 276 cm2
9.A triangle has a base of 10 cm and a perpendicular height of 3 cm. Find its area.

Answer: 15 cm2

  1. A = ½ × base × height = ½ × 10 × 3
  2. = 15 cm2
10.A triangle has a base of 6 cm and a perpendicular height of 5 cm. Find its area.

Answer: 15 cm2

  1. A = ½ × base × height = ½ × 6 × 5
  2. = 15 cm2
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