Year 10 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 10 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 10 · Mathematics · Area & PerimeterYear 10 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 22 cm long and 6 cm wide. Find its area.
Answer: 132 cm2
- A = length × width = 22 × 6
- = 132 cm2
2.A rectangle is 12 m long and 20 m wide. Find its perimeter.
Answer: 64 m
- P = 2 × (12 + 20)
- = 2 × 32 = 64 m
3.A triangle has a base of 12 mm and a perpendicular height of 12 mm. Find its area.
Answer: 72 mm2
- A = ½ × base × height = ½ × 12 × 12
- = 72 mm2
4.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
5.A rectangle is 29 m long and 6 m wide. Find its perimeter.
Answer: 70 m
- P = 2 × (29 + 6)
- = 2 × 35 = 70 m
6.A rectangle is 15 cm long and 6 cm wide. Find its perimeter.
Answer: 42 cm
- P = 2 × (15 + 6)
- = 2 × 21 = 42 cm
7.A triangle has a base of 18 cm and a perpendicular height of 13 cm. Find its area.
Answer: 117 cm2
- A = ½ × base × height = ½ × 18 × 13
- = 117 cm2
8.A triangle has a base of 8 mm and a perpendicular height of 13 mm. Find its area.
Answer: 52 mm2
- A = ½ × base × height = ½ × 8 × 13
- = 52 mm2
9.A rectangle is 29 mm long and 14 mm wide. Find its perimeter.
Answer: 86 mm
- P = 2 × (29 + 14)
- = 2 × 43 = 86 mm
10.A rectangle is 16 mm long and 10 mm wide. Find its area.
Answer: 160 mm2
- A = length × width = 16 × 10
- = 160 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.