Year 6 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 6 area & perimeter worksheet.
Year 6 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 21 cm long and 15 cm wide. Find its area.
Answer: 315 cm2
- A = length × width = 21 × 15
- = 315 cm2
2.A triangle has a base of 9 cm and a perpendicular height of 5 cm. Find its area.
Answer: 22.5 cm2
- A = ½ × base × height = ½ × 9 × 5
- = 22.5 cm2
3.A rectangle is 16 m long and 3 m wide. Find its area.
Answer: 48 m2
- A = length × width = 16 × 3
- = 48 m2
4.A rectangle is 21 mm long and 14 mm wide. Find its area.
Answer: 294 mm2
- A = length × width = 21 × 14
- = 294 mm2
5.An L-shape is made from a 12 mm by 14 mm rectangle joined to a 3 mm by 3 mm rectangle. Find the total area.
Answer: 177 mm2
- Rectangle 1: 12 × 14 = 168
- Rectangle 2: 3 × 3 = 9
- Total: 168 + 9 = 177 mm2
6.An L-shape is made from a 29 mm by 8 mm rectangle joined to a 10 mm by 3 mm rectangle. Find the total area.
Answer: 262 mm2
- Rectangle 1: 29 × 8 = 232
- Rectangle 2: 10 × 3 = 30
- Total: 232 + 30 = 262 mm2
7.A triangle has a base of 10 mm and a perpendicular height of 4 mm. Find its area.
Answer: 20 mm2
- A = ½ × base × height = ½ × 10 × 4
- = 20 mm2
8.A rectangle is 29 mm long and 20 mm wide. Find its area.
Answer: 580 mm2
- A = length × width = 29 × 20
- = 580 mm2
9.A rectangle is 30 mm long and 20 mm wide. Find its area.
Answer: 600 mm2
- A = length × width = 30 × 20
- = 600 mm2
10.An L-shape is made from a 24 m by 20 m rectangle joined to a 14 m by 20 m rectangle. Find the total area.
Answer: 760 m2
- Rectangle 1: 24 × 20 = 480
- Rectangle 2: 14 × 20 = 280
- Total: 480 + 280 = 760 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.