9th Grade Area and Perimeter Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 9th Grade area & perimeter worksheet.
9th Grade Area and Perimeter Worksheet — Level 1 — Practice Set 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 10 m long and 8 m wide. Find its area.
Answer: 80 m2
- A = length × width = 10 × 8
- = 80 m2
2.A rectangle is 3 m long and 12 m wide. Find its area.
Answer: 36 m2
- A = length × width = 3 × 12
- = 36 m2
3.A rectangle is 4 m long and 6 m wide. Find its area.
Answer: 24 m2
- A = length × width = 4 × 6
- = 24 m2
4.A rectangle is 6 cm long and 4 cm wide. Find its perimeter.
Answer: 20 cm
- P = 2 × (6 + 4)
- = 2 × 10 = 20 cm
5.A rectangle is 5 cm long and 12 cm wide. Find its perimeter.
Answer: 34 cm
- P = 2 × (5 + 12)
- = 2 × 17 = 34 cm
6.A rectangle is 9 cm long and 10 cm wide. Find its perimeter.
Answer: 38 cm
- P = 2 × (9 + 10)
- = 2 × 19 = 38 cm
7.A rectangle is 9 mm long and 11 mm wide. Find its area.
Answer: 99 mm2
- A = length × width = 9 × 11
- = 99 mm2
8.A rectangle is 4 mm long and 7 mm wide. Find its perimeter.
Answer: 22 mm
- P = 2 × (4 + 7)
- = 2 × 11 = 22 mm
9.A rectangle is 12 m long and 4 m wide. Find its perimeter.
Answer: 32 m
- P = 2 × (12 + 4)
- = 2 × 16 = 32 m
10.A rectangle is 5 m long and 12 m wide. Find its area.
Answer: 60 m2
- A = length × width = 5 × 12
- = 60 m2
Marking tips
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