Year 8 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Area & PerimeterYear 8 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 18 m long and 2 m wide. Find its area.
Answer: 36 m2
- A = length × width = 18 × 2
- = 36 m2
2.A rectangle is 30 cm long and 19 cm wide. Find its perimeter.
Answer: 98 cm
- P = 2 × (30 + 19)
- = 2 × 49 = 98 cm
3.A triangle has a base of 18 cm and a perpendicular height of 9 cm. Find its area.
Answer: 81 cm2
- A = ½ × base × height = ½ × 18 × 9
- = 81 cm2
4.A rectangle is 7 mm long and 3 mm wide. Find its perimeter.
Answer: 20 mm
- P = 2 × (7 + 3)
- = 2 × 10 = 20 mm
5.A rectangle is 18 mm long and 12 mm wide. Find its perimeter.
Answer: 60 mm
- P = 2 × (18 + 12)
- = 2 × 30 = 60 mm
6.A triangle has a base of 14 mm and a perpendicular height of 5 mm. Find its area.
Answer: 35 mm2
- A = ½ × base × height = ½ × 14 × 5
- = 35 mm2
7.A rectangle is 16 mm long and 8 mm wide. Find its perimeter.
Answer: 48 mm
- P = 2 × (16 + 8)
- = 2 × 24 = 48 mm
8.A rectangle is 10 mm long and 4 mm wide. Find its perimeter.
Answer: 28 mm
- P = 2 × (10 + 4)
- = 2 × 14 = 28 mm
9.A rectangle is 5 mm long and 6 mm wide. Find its perimeter.
Answer: 22 mm
- P = 2 × (5 + 6)
- = 2 × 11 = 22 mm
10.A rectangle is 3 m long and 10 m wide. Find its area.
Answer: 30 m2
- A = length × width = 3 × 10
- = 30 m2
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