4th Grade Area and Perimeter Worksheet — Level 2 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 4th Grade area & perimeter worksheet.
4th Grade Area and Perimeter Worksheet — Level 2 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 10 m long and 18 m wide. Find its area.
Answer: 180 m2
- A = length × width = 10 × 18
- = 180 m2
2.A triangle has a base of 10 m and a height of 6 m. Find its area.
Answer: 30 m2
- A = ½ × base × height = ½ × 10 × 6
- = 30 m2
3.A rectangle is 27 cm long and 13 cm wide. Find its area.
Answer: 351 cm2
- A = length × width = 27 × 13
- = 351 cm2
4.A triangle has a base of 14 mm and a height of 7 mm. Find its area.
Answer: 49 mm2
- A = ½ × base × height = ½ × 14 × 7
- = 49 mm2
5.A rectangle is 20 m long and 4 m wide. Find its area.
Answer: 80 m2
- A = length × width = 20 × 4
- = 80 m2
6.A triangle has a base of 5 mm and a height of 10 mm. Find its area.
Answer: 25 mm2
- A = ½ × base × height = ½ × 5 × 10
- = 25 mm2
7.A rectangle is 19 cm long and 18 cm wide. Find its area.
Answer: 342 cm2
- A = length × width = 19 × 18
- = 342 cm2
8.A rectangle is 10 m long and 15 m wide. Find its perimeter.
Answer: 50 m
- P = 2 × (10 + 15)
- = 2 × 25 = 50 m
9.A rectangle is 2 m long and 9 m wide. Find its perimeter.
Answer: 22 m
- P = 2 × (2 + 9)
- = 2 × 11 = 22 m
10.A rectangle is 13 cm long and 12 cm wide. Find its perimeter.
Answer: 50 cm
- P = 2 × (13 + 12)
- = 2 × 25 = 50 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.