Year 5 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 5 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 5 · Mathematics · Area & PerimeterYear 5 Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.An L-shape is made from a 21 m by 9 m rectangle joined to a 17 m by 5 m rectangle. Find the total area.
Answer: 274 m2
- Rectangle 1: 21 × 9 = 189
- Rectangle 2: 17 × 5 = 85
- Total: 189 + 85 = 274 m2
2.A triangle has a base of 18 m and a perpendicular height of 12 m. Find its area.
Answer: 108 m2
- A = ½ × base × height = ½ × 18 × 12
- = 108 m2
3.A triangle has a base of 14 mm and a perpendicular height of 14 mm. Find its area.
Answer: 98 mm2
- A = ½ × base × height = ½ × 14 × 14
- = 98 mm2
4.A rectangle is 18 mm long and 10 mm wide. Find its area.
Answer: 180 mm2
- A = length × width = 18 × 10
- = 180 mm2
5.A triangle has a base of 9 mm and a perpendicular height of 14 mm. Find its area.
Answer: 63 mm2
- A = ½ × base × height = ½ × 9 × 14
- = 63 mm2
6.A rectangle is 22 mm long and 12 mm wide. Find its area.
Answer: 264 mm2
- A = length × width = 22 × 12
- = 264 mm2
7.A triangle has a base of 10 m and a perpendicular height of 14 m. Find its area.
Answer: 70 m2
- A = ½ × base × height = ½ × 10 × 14
- = 70 m2
8.A rectangle is 30 mm long and 16 mm wide. Find its area.
Answer: 480 mm2
- A = length × width = 30 × 16
- = 480 mm2
9.A triangle has a base of 5 mm and a perpendicular height of 12 mm. Find its area.
Answer: 30 mm2
- A = ½ × base × height = ½ × 5 × 12
- = 30 mm2
10.A triangle has a base of 6 mm and a perpendicular height of 12 mm. Find its area.
Answer: 36 mm2
- A = ½ × base × height = ½ × 6 × 12
- = 36 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.