Year 9 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — 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 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 8 m and a perpendicular height of 6 m. Find its area.
Answer: 24 m2
- A = ½ × base × height = ½ × 8 × 6
- = 24 m2
2.A rectangle is 8 mm long and 3 mm wide. Find its area.
Answer: 24 mm2
- A = length × width = 8 × 3
- = 24 mm2
3.An L-shape is made from a 29 m by 5 m rectangle joined to a 26 m by 9 m rectangle. Find the total area.
Answer: 379 m2
- Rectangle 1: 29 × 5 = 145
- Rectangle 2: 26 × 9 = 234
- Total: 145 + 234 = 379 m2
4.A rectangle is 5 mm long and 15 mm wide. Find its area.
Answer: 75 mm2
- A = length × width = 5 × 15
- = 75 mm2
5.A rectangle is 7 m long and 8 m wide. Find its area.
Answer: 56 m2
- A = length × width = 7 × 8
- = 56 m2
6.An L-shape is made from a 14 mm by 3 mm rectangle joined to a 5 mm by 8 mm rectangle. Find the total area.
Answer: 82 mm2
- Rectangle 1: 14 × 3 = 42
- Rectangle 2: 5 × 8 = 40
- Total: 42 + 40 = 82 mm2
7.A triangle has a base of 7 m and a perpendicular height of 12 m. Find its area.
Answer: 42 m2
- A = ½ × base × height = ½ × 7 × 12
- = 42 m2
8.A triangle has a base of 5 cm and a perpendicular height of 11 cm. Find its area.
Answer: 27.5 cm2
- A = ½ × base × height = ½ × 5 × 11
- = 27.5 cm2
9.A rectangle is 29 mm long and 3 mm wide. Find its area.
Answer: 87 mm2
- A = length × width = 29 × 3
- = 87 mm2
10.A rectangle is 20 m long and 20 m wide. Find its area.
Answer: 400 m2
- A = length × width = 20 × 20
- = 400 m2
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