7th Grade Area and Perimeter Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 7th Grade area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Area & Perimeter7th Grade 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 16 mm and a height of 7 mm. Find its area.
Answer: 56 mm2
- A = ½ × base × height = ½ × 16 × 7
- = 56 mm2
2.A rectangle is 29 cm long and 8 cm wide. Find its perimeter.
Answer: 74 cm
- P = 2 × (29 + 8)
- = 2 × 37 = 74 cm
3.A rectangle is 22 mm long and 4 mm wide. Find its area.
Answer: 88 mm2
- A = length × width = 22 × 4
- = 88 mm2
4.A triangle has a base of 14 mm and a height of 12 mm. Find its area.
Answer: 84 mm2
- A = ½ × base × height = ½ × 14 × 12
- = 84 mm2
5.A rectangle is 30 m long and 3 m wide. Find its area.
Answer: 90 m2
- A = length × width = 30 × 3
- = 90 m2
6.A rectangle is 9 mm long and 7 mm wide. Find its area.
Answer: 63 mm2
- A = length × width = 9 × 7
- = 63 mm2
7.A triangle has a base of 5 cm and a height of 13 cm. Find its area.
Answer: 32.5 cm2
- A = ½ × base × height = ½ × 5 × 13
- = 32.5 cm2
8.A rectangle is 7 cm long and 13 cm wide. Find its area.
Answer: 91 cm2
- A = length × width = 7 × 13
- = 91 cm2
9.A rectangle is 25 cm long and 18 cm wide. Find its perimeter.
Answer: 86 cm
- P = 2 × (25 + 18)
- = 2 × 43 = 86 cm
10.A rectangle is 24 m long and 15 m wide. Find its perimeter.
Answer: 78 m
- P = 2 × (24 + 15)
- = 2 × 39 = 78 m
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.