8th Grade Area and Perimeter Worksheet — Level 2 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 8th Grade area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Area & Perimeter8th Grade Area and Perimeter Worksheet — Level 2 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 15 cm and a height of 5 cm. Find its area.
Answer: 37.5 cm2
- A = ½ × base × height = ½ × 15 × 5
- = 37.5 cm2
2.A rectangle is 9 cm long and 5 cm wide. Find its area.
Answer: 45 cm2
- A = length × width = 9 × 5
- = 45 cm2
3.A rectangle is 30 mm long and 20 mm wide. Find its area.
Answer: 600 mm2
- A = length × width = 30 × 20
- = 600 mm2
4.A rectangle is 17 mm long and 19 mm wide. Find its area.
Answer: 323 mm2
- A = length × width = 17 × 19
- = 323 mm2
5.A rectangle is 25 cm long and 9 cm wide. Find its perimeter.
Answer: 68 cm
- P = 2 × (25 + 9)
- = 2 × 34 = 68 cm
6.A rectangle is 9 m long and 17 m wide. Find its area.
Answer: 153 m2
- A = length × width = 9 × 17
- = 153 m2
7.A rectangle is 22 cm long and 18 cm wide. Find its perimeter.
Answer: 80 cm
- P = 2 × (22 + 18)
- = 2 × 40 = 80 cm
8.A triangle has a base of 4 cm and a height of 13 cm. Find its area.
Answer: 26 cm2
- A = ½ × base × height = ½ × 4 × 13
- = 26 cm2
9.A triangle has a base of 5 m and a height of 13 m. Find its area.
Answer: 32.5 m2
- A = ½ × base × height = ½ × 5 × 13
- = 32.5 m2
10.A rectangle is 29 cm long and 16 cm wide. Find its perimeter.
Answer: 90 cm
- P = 2 × (29 + 16)
- = 2 × 45 = 90 cm
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