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9th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 4 — Answers

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

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Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Area & Perimeter

9th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 4 — Answers

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

1.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
2.An L-shape is made from a 26 cm by 15 cm rectangle joined to a 10 cm by 8 cm rectangle. Find the total area.

Answer: 470 cm2

  1. Rectangle 1: 26 × 15 = 390
  2. Rectangle 2: 10 × 8 = 80
  3. Total: 390 + 80 = 470 cm2
3.An L-shape is made from a 27 m by 13 m rectangle joined to a 4 m by 16 m rectangle. Find the total area.

Answer: 415 m2

  1. Rectangle 1: 27 × 13 = 351
  2. Rectangle 2: 4 × 16 = 64
  3. Total: 351 + 64 = 415 m2
4.An L-shape is made from a 14 m by 2 m rectangle joined to a 13 m by 2 m rectangle. Find the total area.

Answer: 54 m2

  1. Rectangle 1: 14 × 2 = 28
  2. Rectangle 2: 13 × 2 = 26
  3. Total: 28 + 26 = 54 m2
5.An L-shape is made from a 10 mm by 13 mm rectangle joined to a 7 mm by 11 mm rectangle. Find the total area.

Answer: 207 mm2

  1. Rectangle 1: 10 × 13 = 130
  2. Rectangle 2: 7 × 11 = 77
  3. Total: 130 + 77 = 207 mm2
6.A triangle has a base of 13 m and a height of 12 m. Find its area.

Answer: 78 m2

  1. A = ½ × base × height = ½ × 13 × 12
  2. = 78 m2
7.An L-shape is made from a 8 cm by 18 cm rectangle joined to a 4 cm by 16 cm rectangle. Find the total area.

Answer: 208 cm2

  1. Rectangle 1: 8 × 18 = 144
  2. Rectangle 2: 4 × 16 = 64
  3. Total: 144 + 64 = 208 cm2
8.A rectangle is 20 m long and 12 m wide. Find its area.

Answer: 240 m2

  1. A = length × width = 20 × 12
  2. = 240 m2
9.A rectangle is 11 mm long and 20 mm wide. Find its area.

Answer: 220 mm2

  1. A = length × width = 11 × 20
  2. = 220 mm2
10.A rectangle is 18 cm long and 19 cm wide. Find its area.

Answer: 342 cm2

  1. A = length × width = 18 × 19
  2. = 342 cm2
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