Year 9 Area and Perimeter Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the Year 9 area & perimeter worksheet.
Year 9 Area and Perimeter Worksheet — Level 1 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 3 m long and 9 m wide. Find its area.
Answer: 27 m2
- A = length × width = 3 × 9
- = 27 m2
2.A rectangle is 2 m long and 9 m wide. Find its area.
Answer: 18 m2
- A = length × width = 2 × 9
- = 18 m2
3.A rectangle is 7 mm long and 2 mm wide. Find its area.
Answer: 14 mm2
- A = length × width = 7 × 2
- = 14 mm2
4.A rectangle is 2 cm long and 2 cm wide. Find its perimeter.
Answer: 8 cm
- P = 2 × (2 + 2)
- = 2 × 4 = 8 cm
5.A rectangle is 9 m long and 6 m wide. Find its area.
Answer: 54 m2
- A = length × width = 9 × 6
- = 54 m2
6.A rectangle is 10 m long and 8 m wide. Find its area.
Answer: 80 m2
- A = length × width = 10 × 8
- = 80 m2
7.A rectangle is 5 m long and 4 m wide. Find its perimeter.
Answer: 18 m
- P = 2 × (5 + 4)
- = 2 × 9 = 18 m
8.A rectangle is 7 m long and 2 m wide. Find its area.
Answer: 14 m2
- A = length × width = 7 × 2
- = 14 m2
9.A rectangle is 9 cm long and 9 cm wide. Find its perimeter.
Answer: 36 cm
- P = 2 × (9 + 9)
- = 2 × 18 = 36 cm
10.A rectangle is 11 cm long and 2 cm wide. Find its area.
Answer: 22 cm2
- A = length × width = 11 × 2
- = 22 cm2
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.