6th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 6th Grade area & perimeter worksheet.
6th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 4 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 19 mm long and 13 mm wide. Find its area.
Answer: 247 mm2
- A = length × width = 19 × 13
- = 247 mm2
2.An L-shape is made from a 7 m by 11 m rectangle joined to a 4 m by 15 m rectangle. Find the total area.
Answer: 137 m2
- Rectangle 1: 7 × 11 = 77
- Rectangle 2: 4 × 15 = 60
- Total: 77 + 60 = 137 m2
3.An L-shape is made from a 2 cm by 9 cm rectangle joined to a 2 cm by 2 cm rectangle. Find the total area.
Answer: 22 cm2
- Rectangle 1: 2 × 9 = 18
- Rectangle 2: 2 × 2 = 4
- Total: 18 + 4 = 22 cm2
4.A triangle has a base of 15 cm and a height of 12 cm. Find its area.
Answer: 90 cm2
- A = ½ × base × height = ½ × 15 × 12
- = 90 cm2
5.A triangle has a base of 11 mm and a height of 15 mm. Find its area.
Answer: 82.5 mm2
- A = ½ × base × height = ½ × 11 × 15
- = 82.5 mm2
6.An L-shape is made from a 5 cm by 5 cm rectangle joined to a 4 cm by 8 cm rectangle. Find the total area.
Answer: 57 cm2
- Rectangle 1: 5 × 5 = 25
- Rectangle 2: 4 × 8 = 32
- Total: 25 + 32 = 57 cm2
7.A rectangle is 9 cm long and 15 cm wide. Find its area.
Answer: 135 cm2
- A = length × width = 9 × 15
- = 135 cm2
8.A rectangle is 17 m long and 17 m wide. Find its area.
Answer: 289 m2
- A = length × width = 17 × 17
- = 289 m2
9.An L-shape is made from a 28 mm by 3 mm rectangle joined to a 2 mm by 3 mm rectangle. Find the total area.
Answer: 90 mm2
- Rectangle 1: 28 × 3 = 84
- Rectangle 2: 2 × 3 = 6
- Total: 84 + 6 = 90 mm2
10.A triangle has a base of 9 mm and a height of 13 mm. Find its area.
Answer: 58.5 mm2
- A = ½ × base × height = ½ × 9 × 13
- = 58.5 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.