Year 7 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 7 area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Area & PerimeterYear 7 Area and Perimeter Worksheet — Level 2 — Practice Set 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 6 cm and a perpendicular height of 14 cm. Find its area.
Answer: 42 cm2
- A = ½ × base × height = ½ × 6 × 14
- = 42 cm2
2.A rectangle is 27 cm long and 20 cm wide. Find its area.
Answer: 540 cm2
- A = length × width = 27 × 20
- = 540 cm2
3.A triangle has a base of 4 mm and a perpendicular height of 10 mm. Find its area.
Answer: 20 mm2
- A = ½ × base × height = ½ × 4 × 10
- = 20 mm2
4.A triangle has a base of 12 cm and a perpendicular height of 3 cm. Find its area.
Answer: 18 cm2
- A = ½ × base × height = ½ × 12 × 3
- = 18 cm2
5.A triangle has a base of 14 mm and a perpendicular height of 9 mm. Find its area.
Answer: 63 mm2
- A = ½ × base × height = ½ × 14 × 9
- = 63 mm2
6.A rectangle is 16 cm long and 6 cm wide. Find its perimeter.
Answer: 44 cm
- P = 2 × (16 + 6)
- = 2 × 22 = 44 cm
7.A triangle has a base of 11 mm and a perpendicular height of 14 mm. Find its area.
Answer: 77 mm2
- A = ½ × base × height = ½ × 11 × 14
- = 77 mm2
8.A rectangle is 20 mm long and 6 mm wide. Find its perimeter.
Answer: 52 mm
- P = 2 × (20 + 6)
- = 2 × 26 = 52 mm
9.A triangle has a base of 19 m and a perpendicular height of 3 m. Find its area.
Answer: 28.5 m2
- A = ½ × base × height = ½ × 19 × 3
- = 28.5 m2
10.A rectangle is 24 cm long and 13 cm wide. Find its perimeter.
Answer: 74 cm
- P = 2 × (24 + 13)
- = 2 × 37 = 74 cm
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.