Year 5 Area and Perimeter Worksheet — Level 3 — 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 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 10 cm and a perpendicular height of 12 cm. Find its area.
Answer: 60 cm2
- A = ½ × base × height = ½ × 10 × 12
- = 60 cm2
2.A rectangle is 7 mm long and 15 mm wide. Find its area.
Answer: 105 mm2
- A = length × width = 7 × 15
- = 105 mm2
3.An L-shape is made from a 18 m by 13 m rectangle joined to a 13 m by 17 m rectangle. Find the total area.
Answer: 455 m2
- Rectangle 1: 18 × 13 = 234
- Rectangle 2: 13 × 17 = 221
- Total: 234 + 221 = 455 m2
4.An L-shape is made from a 23 mm by 4 mm rectangle joined to a 19 mm by 3 mm rectangle. Find the total area.
Answer: 149 mm2
- Rectangle 1: 23 × 4 = 92
- Rectangle 2: 19 × 3 = 57
- Total: 92 + 57 = 149 mm2
5.A triangle has a base of 12 m and a perpendicular height of 3 m. Find its area.
Answer: 18 m2
- A = ½ × base × height = ½ × 12 × 3
- = 18 m2
6.A rectangle is 26 cm long and 15 cm wide. Find its area.
Answer: 390 cm2
- A = length × width = 26 × 15
- = 390 cm2
7.A triangle has a base of 13 cm and a perpendicular height of 5 cm. Find its area.
Answer: 32.5 cm2
- A = ½ × base × height = ½ × 13 × 5
- = 32.5 cm2
8.A triangle has a base of 20 mm and a perpendicular height of 5 mm. Find its area.
Answer: 50 mm2
- A = ½ × base × height = ½ × 20 × 5
- = 50 mm2
9.An L-shape is made from a 26 mm by 12 mm rectangle joined to a 24 mm by 14 mm rectangle. Find the total area.
Answer: 648 mm2
- Rectangle 1: 26 × 12 = 312
- Rectangle 2: 24 × 14 = 336
- Total: 312 + 336 = 648 mm2
10.A rectangle is 21 m long and 15 m wide. Find its area.
Answer: 315 m2
- A = length × width = 21 × 15
- = 315 m2
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