Year 10 Area and Perimeter Worksheet — Level 3 — Practice Set 4 — 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 3 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 23 mm long and 13 mm wide. Find its area.
Answer: 299 mm2
- A = length × width = 23 × 13
- = 299 mm2
2.A triangle has a base of 13 m and a perpendicular height of 7 m. Find its area.
Answer: 45.5 m2
- A = ½ × base × height = ½ × 13 × 7
- = 45.5 m2
3.An L-shape is made from a 20 mm by 18 mm rectangle joined to a 17 mm by 13 mm rectangle. Find the total area.
Answer: 581 mm2
- Rectangle 1: 20 × 18 = 360
- Rectangle 2: 17 × 13 = 221
- Total: 360 + 221 = 581 mm2
4.A rectangle is 5 cm long and 19 cm wide. Find its area.
Answer: 95 cm2
- A = length × width = 5 × 19
- = 95 cm2
5.A rectangle is 24 m long and 12 m wide. Find its area.
Answer: 288 m2
- A = length × width = 24 × 12
- = 288 m2
6.A rectangle is 7 m long and 3 m wide. Find its area.
Answer: 21 m2
- A = length × width = 7 × 3
- = 21 m2
7.A rectangle is 8 mm long and 16 mm wide. Find its area.
Answer: 128 mm2
- A = length × width = 8 × 16
- = 128 mm2
8.An L-shape is made from a 2 cm by 13 cm rectangle joined to a 2 cm by 2 cm rectangle. Find the total area.
Answer: 30 cm2
- Rectangle 1: 2 × 13 = 26
- Rectangle 2: 2 × 2 = 4
- Total: 26 + 4 = 30 cm2
9.An L-shape is made from a 15 cm by 19 cm rectangle joined to a 6 cm by 13 cm rectangle. Find the total area.
Answer: 363 cm2
- Rectangle 1: 15 × 19 = 285
- Rectangle 2: 6 × 13 = 78
- Total: 285 + 78 = 363 cm2
10.A rectangle is 13 cm long and 13 cm wide. Find its area.
Answer: 169 cm2
- A = length × width = 13 × 13
- = 169 cm2
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