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 26 mm long and 20 mm wide. Find its perimeter.
Answer: 92 mm
- P = 2 × (26 + 20)
- = 2 × 46 = 92 mm
2.A rectangle is 9 m long and 5 m wide. Find its area.
Answer: 45 m2
- A = length × width = 9 × 5
- = 45 m2
3.A triangle has a base of 7 mm and a perpendicular height of 13 mm. Find its area.
Answer: 45.5 mm2
- A = ½ × base × height = ½ × 7 × 13
- = 45.5 mm2
4.A triangle has a base of 4 m and a perpendicular height of 4 m. Find its area.
Answer: 8 m2
- A = ½ × base × height = ½ × 4 × 4
- = 8 m2
5.A triangle has a base of 13 mm and a perpendicular height of 8 mm. Find its area.
Answer: 52 mm2
- A = ½ × base × height = ½ × 13 × 8
- = 52 mm2
6.A triangle has a base of 14 mm and a perpendicular height of 8 mm. Find its area.
Answer: 56 mm2
- A = ½ × base × height = ½ × 14 × 8
- = 56 mm2
7.A rectangle is 4 cm long and 11 cm wide. Find its area.
Answer: 44 cm2
- A = length × width = 4 × 11
- = 44 cm2
8.A rectangle is 11 mm long and 12 mm wide. Find its perimeter.
Answer: 46 mm
- P = 2 × (11 + 12)
- = 2 × 23 = 46 mm
9.A rectangle is 16 mm long and 17 mm wide. Find its area.
Answer: 272 mm2
- A = length × width = 16 × 17
- = 272 mm2
10.A triangle has a base of 8 mm and a perpendicular height of 8 mm. Find its area.
Answer: 32 mm2
- A = ½ × base × height = ½ × 8 × 8
- = 32 mm2
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