Year 9 Area and Perimeter Worksheet — Level 1 — 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 1 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 6 cm long and 5 cm wide. Find its perimeter.
Answer: 22 cm
- P = 2 × (6 + 5)
- = 2 × 11 = 22 cm
2.A rectangle is 4 cm long and 9 cm wide. Find its perimeter.
Answer: 26 cm
- P = 2 × (4 + 9)
- = 2 × 13 = 26 cm
3.A rectangle is 6 m long and 4 m wide. Find its perimeter.
Answer: 20 m
- P = 2 × (6 + 4)
- = 2 × 10 = 20 m
4.A rectangle is 12 m long and 2 m wide. Find its area.
Answer: 24 m2
- A = length × width = 12 × 2
- = 24 m2
5.A rectangle is 8 cm long and 7 cm wide. Find its perimeter.
Answer: 30 cm
- P = 2 × (8 + 7)
- = 2 × 15 = 30 cm
6.A rectangle is 10 cm long and 5 cm wide. Find its perimeter.
Answer: 30 cm
- P = 2 × (10 + 5)
- = 2 × 15 = 30 cm
7.A rectangle is 8 mm long and 2 mm wide. Find its perimeter.
Answer: 20 mm
- P = 2 × (8 + 2)
- = 2 × 10 = 20 mm
8.A rectangle is 2 cm long and 3 cm wide. Find its perimeter.
Answer: 10 cm
- P = 2 × (2 + 3)
- = 2 × 5 = 10 cm
9.A rectangle is 4 mm long and 8 mm wide. Find its perimeter.
Answer: 24 mm
- P = 2 × (4 + 8)
- = 2 × 12 = 24 mm
10.A rectangle is 9 mm long and 11 mm wide. Find its area.
Answer: 99 mm2
- A = length × width = 9 × 11
- = 99 mm2
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.