Year 9 Area and Perimeter Worksheet — Level 3 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 9 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Area & PerimeterYear 9 Area and Perimeter Worksheet — Level 3 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 14 mm long and 10 mm wide. Find its area.
Answer: 140 mm2
- A = length × width = 14 × 10
- = 140 mm2
2.A rectangle is 25 mm long and 4 mm wide. Find its area.
Answer: 100 mm2
- A = length × width = 25 × 4
- = 100 mm2
3.A rectangle is 22 m long and 7 m wide. Find its area.
Answer: 154 m2
- A = length × width = 22 × 7
- = 154 m2
4.A triangle has a base of 15 cm and a perpendicular height of 14 cm. Find its area.
Answer: 105 cm2
- A = ½ × base × height = ½ × 15 × 14
- = 105 cm2
5.A rectangle is 13 m long and 11 m wide. Find its area.
Answer: 143 m2
- A = length × width = 13 × 11
- = 143 m2
6.An L-shape is made from a 24 mm by 4 mm rectangle joined to a 12 mm by 6 mm rectangle. Find the total area.
Answer: 168 mm2
- Rectangle 1: 24 × 4 = 96
- Rectangle 2: 12 × 6 = 72
- Total: 96 + 72 = 168 mm2
7.A triangle has a base of 12 m and a perpendicular height of 11 m. Find its area.
Answer: 66 m2
- A = ½ × base × height = ½ × 12 × 11
- = 66 m2
8.A rectangle is 20 m long and 8 m wide. Find its area.
Answer: 160 m2
- A = length × width = 20 × 8
- = 160 m2
9.A rectangle is 29 m long and 13 m wide. Find its area.
Answer: 377 m2
- A = length × width = 29 × 13
- = 377 m2
10.A rectangle is 25 m long and 20 m wide. Find its area.
Answer: 500 m2
- A = length × width = 25 × 20
- = 500 m2
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