Year 8 Area and Perimeter Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Area & PerimeterYear 8 Area and Perimeter Worksheet — Level 1 — Practice Set 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 9 cm long and 9 cm wide. Find its area.
Answer: 81 cm2
- A = length × width = 9 × 9
- = 81 cm2
2.A rectangle is 6 mm long and 6 mm wide. Find its area.
Answer: 36 mm2
- A = length × width = 6 × 6
- = 36 mm2
3.A rectangle is 7 m long and 2 m wide. Find its perimeter.
Answer: 18 m
- P = 2 × (7 + 2)
- = 2 × 9 = 18 m
4.A rectangle is 2 mm long and 9 mm wide. Find its perimeter.
Answer: 22 mm
- P = 2 × (2 + 9)
- = 2 × 11 = 22 mm
5.A rectangle is 2 cm long and 11 cm wide. Find its perimeter.
Answer: 26 cm
- P = 2 × (2 + 11)
- = 2 × 13 = 26 cm
6.A rectangle is 5 cm long and 6 cm wide. Find its area.
Answer: 30 cm2
- A = length × width = 5 × 6
- = 30 cm2
7.A rectangle is 3 m long and 3 m wide. Find its perimeter.
Answer: 12 m
- P = 2 × (3 + 3)
- = 2 × 6 = 12 m
8.A rectangle is 9 cm long and 11 cm wide. Find its area.
Answer: 99 cm2
- A = length × width = 9 × 11
- = 99 cm2
9.A rectangle is 6 cm long and 5 cm wide. Find its perimeter.
Answer: 22 cm
- P = 2 × (6 + 5)
- = 2 × 11 = 22 cm
10.A rectangle is 11 m long and 4 m wide. Find its perimeter.
Answer: 30 m
- P = 2 × (11 + 4)
- = 2 × 15 = 30 m
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.