6th Grade Area and Perimeter Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 6th Grade area & perimeter worksheet.
6th Grade Area and Perimeter Worksheet — Level 3 — Answers
Write the formula, substitute, then calculate. Include units.
1.An L-shape is made from a 26 cm by 19 cm rectangle joined to a 6 cm by 17 cm rectangle. Find the total area.
Answer: 596 cm2
- Rectangle 1: 26 × 19 = 494
- Rectangle 2: 6 × 17 = 102
- Total: 494 + 102 = 596 cm2
2.An L-shape is made from a 22 cm by 13 cm rectangle joined to a 10 cm by 15 cm rectangle. Find the total area.
Answer: 436 cm2
- Rectangle 1: 22 × 13 = 286
- Rectangle 2: 10 × 15 = 150
- Total: 286 + 150 = 436 cm2
3.An L-shape is made from a 11 mm by 17 mm rectangle joined to a 4 mm by 22 mm rectangle. Find the total area.
Answer: 275 mm2
- Rectangle 1: 11 × 17 = 187
- Rectangle 2: 4 × 22 = 88
- Total: 187 + 88 = 275 mm2
4.A rectangle is 29 mm long and 16 mm wide. Find its area.
Answer: 464 mm2
- A = length × width = 29 × 16
- = 464 mm2
5.An L-shape is made from a 24 mm by 6 mm rectangle joined to a 15 mm by 11 mm rectangle. Find the total area.
Answer: 309 mm2
- Rectangle 1: 24 × 6 = 144
- Rectangle 2: 15 × 11 = 165
- Total: 144 + 165 = 309 mm2
6.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
7.A triangle has a base of 20 cm and a height of 9 cm. Find its area.
Answer: 90 cm2
- A = ½ × base × height = ½ × 20 × 9
- = 90 cm2
8.An L-shape is made from a 11 m by 10 m rectangle joined to a 10 m by 5 m rectangle. Find the total area.
Answer: 160 m2
- Rectangle 1: 11 × 10 = 110
- Rectangle 2: 10 × 5 = 50
- Total: 110 + 50 = 160 m2
9.A rectangle is 19 mm long and 4 mm wide. Find its area.
Answer: 76 mm2
- A = length × width = 19 × 4
- = 76 mm2
10.A rectangle is 30 mm long and 2 mm wide. Find its area.
Answer: 60 mm2
- A = length × width = 30 × 2
- = 60 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.