Year 9 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — 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 — Practice Set 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 29 cm long and 7 cm wide. Find its area.
Answer: 203 cm2
- A = length × width = 29 × 7
- = 203 cm2
2.A rectangle is 20 mm long and 8 mm wide. Find its area.
Answer: 160 mm2
- A = length × width = 20 × 8
- = 160 mm2
3.A triangle has a base of 13 m and a perpendicular height of 4 m. Find its area.
Answer: 26 m2
- A = ½ × base × height = ½ × 13 × 4
- = 26 m2
4.A rectangle is 12 m long and 11 m wide. Find its perimeter.
Answer: 46 m
- P = 2 × (12 + 11)
- = 2 × 23 = 46 m
5.A rectangle is 27 m long and 3 m wide. Find its area.
Answer: 81 m2
- A = length × width = 27 × 3
- = 81 m2
6.A triangle has a base of 13 cm and a perpendicular height of 12 cm. Find its area.
Answer: 78 cm2
- A = ½ × base × height = ½ × 13 × 12
- = 78 cm2
7.A triangle has a base of 19 cm and a perpendicular height of 14 cm. Find its area.
Answer: 133 cm2
- A = ½ × base × height = ½ × 19 × 14
- = 133 cm2
8.A rectangle is 27 mm long and 5 mm wide. Find its perimeter.
Answer: 64 mm
- P = 2 × (27 + 5)
- = 2 × 32 = 64 mm
9.A triangle has a base of 19 mm and a perpendicular height of 4 mm. Find its area.
Answer: 38 mm2
- A = ½ × base × height = ½ × 19 × 4
- = 38 mm2
10.A rectangle is 20 m long and 8 m wide. Find its area.
Answer: 160 m2
- A = length × width = 20 × 8
- = 160 m2
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