Year 8 Area and Perimeter Worksheet — Level 2 — Practice Set 2 — 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 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 20 m and a perpendicular height of 15 m. Find its area.
Answer: 150 m2
- A = ½ × base × height = ½ × 20 × 15
- = 150 m2
2.A triangle has a base of 19 mm and a perpendicular height of 14 mm. Find its area.
Answer: 133 mm2
- A = ½ × base × height = ½ × 19 × 14
- = 133 mm2
3.A rectangle is 20 m long and 19 m wide. Find its area.
Answer: 380 m2
- A = length × width = 20 × 19
- = 380 m2
4.A rectangle is 26 mm long and 8 mm wide. Find its perimeter.
Answer: 68 mm
- P = 2 × (26 + 8)
- = 2 × 34 = 68 mm
5.A triangle has a base of 9 cm and a perpendicular height of 10 cm. Find its area.
Answer: 45 cm2
- A = ½ × base × height = ½ × 9 × 10
- = 45 cm2
6.A rectangle is 30 cm long and 12 cm wide. Find its perimeter.
Answer: 84 cm
- P = 2 × (30 + 12)
- = 2 × 42 = 84 cm
7.A triangle has a base of 5 cm and a perpendicular height of 6 cm. Find its area.
Answer: 15 cm2
- A = ½ × base × height = ½ × 5 × 6
- = 15 cm2
8.A rectangle is 18 cm long and 16 cm wide. Find its area.
Answer: 288 cm2
- A = length × width = 18 × 16
- = 288 cm2
9.A triangle has a base of 8 cm and a perpendicular height of 10 cm. Find its area.
Answer: 40 cm2
- A = ½ × base × height = ½ × 8 × 10
- = 40 cm2
10.A triangle has a base of 5 m and a perpendicular height of 5 m. Find its area.
Answer: 12.5 m2
- A = ½ × base × height = ½ × 5 × 5
- = 12.5 m2
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