Year 9 Area and Perimeter Worksheet — Level 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 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 24 mm long and 14 mm wide. Find its perimeter.
Answer: 76 mm
- P = 2 × (24 + 14)
- = 2 × 38 = 76 mm
2.A triangle has a base of 9 m and a perpendicular height of 15 m. Find its area.
Answer: 67.5 m2
- A = ½ × base × height = ½ × 9 × 15
- = 67.5 m2
3.A rectangle is 8 cm long and 8 cm wide. Find its perimeter.
Answer: 32 cm
- P = 2 × (8 + 8)
- = 2 × 16 = 32 cm
4.A triangle has a base of 10 mm and a perpendicular height of 11 mm. Find its area.
Answer: 55 mm2
- A = ½ × base × height = ½ × 10 × 11
- = 55 mm2
5.A rectangle is 24 cm long and 18 cm wide. Find its area.
Answer: 432 cm2
- A = length × width = 24 × 18
- = 432 cm2
6.A rectangle is 15 mm long and 19 mm wide. Find its area.
Answer: 285 mm2
- A = length × width = 15 × 19
- = 285 mm2
7.A rectangle is 12 cm long and 18 cm wide. Find its perimeter.
Answer: 60 cm
- P = 2 × (12 + 18)
- = 2 × 30 = 60 cm
8.A rectangle is 21 mm long and 16 mm wide. Find its area.
Answer: 336 mm2
- A = length × width = 21 × 16
- = 336 mm2
9.A rectangle is 5 mm long and 17 mm wide. Find its area.
Answer: 85 mm2
- A = length × width = 5 × 17
- = 85 mm2
10.A rectangle is 9 m long and 15 m wide. Find its perimeter.
Answer: 48 m
- P = 2 × (9 + 15)
- = 2 × 24 = 48 m
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