Year 8 Area and Perimeter Worksheet — Level 2 — Practice Set 4 — 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 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 20 cm long and 9 cm wide. Find its perimeter.
Answer: 58 cm
- P = 2 × (20 + 9)
- = 2 × 29 = 58 cm
2.A rectangle is 19 cm long and 13 cm wide. Find its perimeter.
Answer: 64 cm
- P = 2 × (19 + 13)
- = 2 × 32 = 64 cm
3.A triangle has a base of 12 m and a perpendicular height of 13 m. Find its area.
Answer: 78 m2
- A = ½ × base × height = ½ × 12 × 13
- = 78 m2
4.A triangle has a base of 9 mm and a perpendicular height of 10 mm. Find its area.
Answer: 45 mm2
- A = ½ × base × height = ½ × 9 × 10
- = 45 mm2
5.A triangle has a base of 17 cm and a perpendicular height of 6 cm. Find its area.
Answer: 51 cm2
- A = ½ × base × height = ½ × 17 × 6
- = 51 cm2
6.A rectangle is 13 m long and 2 m wide. Find its perimeter.
Answer: 30 m
- P = 2 × (13 + 2)
- = 2 × 15 = 30 m
7.A triangle has a base of 17 cm and a perpendicular height of 5 cm. Find its area.
Answer: 42.5 cm2
- A = ½ × base × height = ½ × 17 × 5
- = 42.5 cm2
8.A triangle has a base of 12 mm and a perpendicular height of 7 mm. Find its area.
Answer: 42 mm2
- A = ½ × base × height = ½ × 12 × 7
- = 42 mm2
9.A rectangle is 8 cm long and 17 cm wide. Find its area.
Answer: 136 cm2
- A = length × width = 8 × 17
- = 136 cm2
10.A rectangle is 23 m long and 2 m wide. Find its area.
Answer: 46 m2
- A = length × width = 23 × 2
- = 46 m2
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