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 7 mm long and 19 mm wide. Find its perimeter.
Answer: 52 mm
- P = 2 × (7 + 19)
- = 2 × 26 = 52 mm
2.A triangle has a base of 15 mm and a perpendicular height of 7 mm. Find its area.
Answer: 52.5 mm2
- A = ½ × base × height = ½ × 15 × 7
- = 52.5 mm2
3.A triangle has a base of 7 mm and a perpendicular height of 6 mm. Find its area.
Answer: 21 mm2
- A = ½ × base × height = ½ × 7 × 6
- = 21 mm2
4.A rectangle is 14 m long and 4 m wide. Find its perimeter.
Answer: 36 m
- P = 2 × (14 + 4)
- = 2 × 18 = 36 m
5.A rectangle is 14 cm long and 13 cm wide. Find its perimeter.
Answer: 54 cm
- P = 2 × (14 + 13)
- = 2 × 27 = 54 cm
6.A triangle has a base of 9 m and a perpendicular height of 8 m. Find its area.
Answer: 36 m2
- A = ½ × base × height = ½ × 9 × 8
- = 36 m2
7.A rectangle is 6 mm long and 18 mm wide. Find its area.
Answer: 108 mm2
- A = length × width = 6 × 18
- = 108 mm2
8.A rectangle is 10 m long and 10 m wide. Find its area.
Answer: 100 m2
- A = length × width = 10 × 10
- = 100 m2
9.A triangle has a base of 10 m and a perpendicular height of 3 m. Find its area.
Answer: 15 m2
- A = ½ × base × height = ½ × 10 × 3
- = 15 m2
10.A rectangle is 27 cm long and 2 cm wide. Find its perimeter.
Answer: 58 cm
- P = 2 × (27 + 2)
- = 2 × 29 = 58 cm
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