Year 8 Area and Perimeter Worksheet — Level 1 — Practice Set 2 — 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 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 3 m long and 11 m wide. Find its perimeter.
Answer: 28 m
- P = 2 × (3 + 11)
- = 2 × 14 = 28 m
2.A rectangle is 10 mm long and 4 mm wide. Find its perimeter.
Answer: 28 mm
- P = 2 × (10 + 4)
- = 2 × 14 = 28 mm
3.A rectangle is 5 cm long and 5 cm wide. Find its perimeter.
Answer: 20 cm
- P = 2 × (5 + 5)
- = 2 × 10 = 20 cm
4.A rectangle is 10 mm long and 10 mm wide. Find its perimeter.
Answer: 40 mm
- P = 2 × (10 + 10)
- = 2 × 20 = 40 mm
5.A rectangle is 9 mm long and 9 mm wide. Find its area.
Answer: 81 mm2
- A = length × width = 9 × 9
- = 81 mm2
6.A rectangle is 10 cm long and 5 cm wide. Find its area.
Answer: 50 cm2
- A = length × width = 10 × 5
- = 50 cm2
7.A rectangle is 3 m long and 3 m wide. Find its area.
Answer: 9 m2
- A = length × width = 3 × 3
- = 9 m2
8.A rectangle is 9 cm long and 9 cm wide. Find its perimeter.
Answer: 36 cm
- P = 2 × (9 + 9)
- = 2 × 18 = 36 cm
9.A rectangle is 2 mm long and 6 mm wide. Find its area.
Answer: 12 mm2
- A = length × width = 2 × 6
- = 12 mm2
10.A rectangle is 6 m long and 4 m wide. Find its area.
Answer: 24 m2
- A = length × width = 6 × 4
- = 24 m2
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.