Year 10 Area and Perimeter Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 10 area & perimeter worksheet.
Year 10 Area and Perimeter Worksheet — Level 2 — Practice Set 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 16 mm and a perpendicular height of 5 mm. Find its area.
Answer: 40 mm2
- A = ½ × base × height = ½ × 16 × 5
- = 40 mm2
2.A rectangle is 22 m long and 7 m wide. Find its perimeter.
Answer: 58 m
- P = 2 × (22 + 7)
- = 2 × 29 = 58 m
3.A rectangle is 19 cm long and 6 cm wide. Find its perimeter.
Answer: 50 cm
- P = 2 × (19 + 6)
- = 2 × 25 = 50 cm
4.A rectangle is 5 m long and 17 m wide. Find its perimeter.
Answer: 44 m
- P = 2 × (5 + 17)
- = 2 × 22 = 44 m
5.A rectangle is 11 m long and 11 m wide. Find its area.
Answer: 121 m2
- A = length × width = 11 × 11
- = 121 m2
6.A rectangle is 9 m long and 6 m wide. Find its perimeter.
Answer: 30 m
- P = 2 × (9 + 6)
- = 2 × 15 = 30 m
7.A rectangle is 5 m long and 5 m wide. Find its perimeter.
Answer: 20 m
- P = 2 × (5 + 5)
- = 2 × 10 = 20 m
8.A rectangle is 30 cm long and 13 cm wide. Find its perimeter.
Answer: 86 cm
- P = 2 × (30 + 13)
- = 2 × 43 = 86 cm
9.A triangle has a base of 4 mm and a perpendicular height of 13 mm. Find its area.
Answer: 26 mm2
- A = ½ × base × height = ½ × 4 × 13
- = 26 mm2
10.A rectangle is 13 cm long and 14 cm wide. Find its area.
Answer: 182 cm2
- A = length × width = 13 × 14
- = 182 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.