4th Grade Area and Perimeter Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 4th Grade area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheet4th Grade · Mathematics · Area & Perimeter4th Grade Area and Perimeter Worksheet — Level 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.A triangle has a base of 5 cm and a height of 11 cm. Find its area.
Answer: 27.5 cm2
- A = ½ × base × height = ½ × 5 × 11
- = 27.5 cm2
2.A rectangle is 5 mm long and 10 mm wide. Find its area.
Answer: 50 mm2
- A = length × width = 5 × 10
- = 50 mm2
3.A rectangle is 27 cm long and 14 cm wide. Find its area.
Answer: 378 cm2
- A = length × width = 27 × 14
- = 378 cm2
4.An L-shape is made from a 28 cm by 19 cm rectangle joined to a 8 cm by 5 cm rectangle. Find the total area.
Answer: 572 cm2
- Rectangle 1: 28 × 19 = 532
- Rectangle 2: 8 × 5 = 40
- Total: 532 + 40 = 572 cm2
5.A rectangle is 16 m long and 6 m wide. Find its area.
Answer: 96 m2
- A = length × width = 16 × 6
- = 96 m2
6.A rectangle is 6 cm long and 9 cm wide. Find its area.
Answer: 54 cm2
- A = length × width = 6 × 9
- = 54 cm2
7.A triangle has a base of 14 m and a height of 10 m. Find its area.
Answer: 70 m2
- A = ½ × base × height = ½ × 14 × 10
- = 70 m2
8.A rectangle is 21 cm long and 9 cm wide. Find its area.
Answer: 189 cm2
- A = length × width = 21 × 9
- = 189 cm2
9.A triangle has a base of 15 m and a height of 12 m. Find its area.
Answer: 90 m2
- A = ½ × base × height = ½ × 15 × 12
- = 90 m2
10.A rectangle is 18 mm long and 5 mm wide. Find its area.
Answer: 90 mm2
- A = length × width = 18 × 5
- = 90 mm2
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.
Great work. Here's what to try next: