9th Grade Area and Perimeter Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 9th Grade area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Area & Perimeter9th Grade Area and Perimeter Worksheet — Level 1 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 2 m long and 5 m wide. Find its area.
Answer: 10 m2
- A = length × width = 2 × 5
- = 10 m2
2.A rectangle is 7 mm long and 10 mm wide. Find its perimeter.
Answer: 34 mm
- P = 2 × (7 + 10)
- = 2 × 17 = 34 mm
3.A rectangle is 4 cm long and 6 cm wide. Find its perimeter.
Answer: 20 cm
- P = 2 × (4 + 6)
- = 2 × 10 = 20 cm
4.A rectangle is 4 m long and 3 m wide. Find its perimeter.
Answer: 14 m
- P = 2 × (4 + 3)
- = 2 × 7 = 14 m
5.A rectangle is 3 cm long and 2 cm wide. Find its perimeter.
Answer: 10 cm
- P = 2 × (3 + 2)
- = 2 × 5 = 10 cm
6.A rectangle is 8 cm long and 4 cm wide. Find its area.
Answer: 32 cm2
- A = length × width = 8 × 4
- = 32 cm2
7.A rectangle is 4 cm long and 3 cm wide. Find its perimeter.
Answer: 14 cm
- P = 2 × (4 + 3)
- = 2 × 7 = 14 cm
8.A rectangle is 5 m long and 6 m wide. Find its area.
Answer: 30 m2
- A = length × width = 5 × 6
- = 30 m2
9.A rectangle is 7 mm long and 2 mm wide. Find its perimeter.
Answer: 18 mm
- P = 2 × (7 + 2)
- = 2 × 9 = 18 mm
10.A rectangle is 3 mm long and 5 mm wide. Find its perimeter.
Answer: 16 mm
- P = 2 × (3 + 5)
- = 2 × 8 = 16 mm
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.