7th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 7th Grade area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Area & Perimeter7th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 5 mm long and 10 mm wide. Find its area.
Answer: 50 mm2
- A = length × width = 5 × 10
- = 50 mm2
2.A triangle has a base of 12 cm and a height of 14 cm. Find its area.
Answer: 84 cm2
- A = ½ × base × height = ½ × 12 × 14
- = 84 cm2
3.An L-shape is made from a 4 m by 7 m rectangle joined to a 3 m by 10 m rectangle. Find the total area.
Answer: 58 m2
- Rectangle 1: 4 × 7 = 28
- Rectangle 2: 3 × 10 = 30
- Total: 28 + 30 = 58 m2
4.A rectangle is 8 mm long and 19 mm wide. Find its area.
Answer: 152 mm2
- A = length × width = 8 × 19
- = 152 mm2
5.A rectangle is 5 mm long and 3 mm wide. Find its area.
Answer: 15 mm2
- A = length × width = 5 × 3
- = 15 mm2
6.An L-shape is made from a 30 mm by 16 mm rectangle joined to a 20 mm by 12 mm rectangle. Find the total area.
Answer: 720 mm2
- Rectangle 1: 30 × 16 = 480
- Rectangle 2: 20 × 12 = 240
- Total: 480 + 240 = 720 mm2
7.A triangle has a base of 15 mm and a height of 4 mm. Find its area.
Answer: 30 mm2
- A = ½ × base × height = ½ × 15 × 4
- = 30 mm2
8.A triangle has a base of 16 cm and a height of 9 cm. Find its area.
Answer: 72 cm2
- A = ½ × base × height = ½ × 16 × 9
- = 72 cm2
9.A triangle has a base of 9 mm and a height of 14 mm. Find its area.
Answer: 63 mm2
- A = ½ × base × height = ½ × 9 × 14
- = 63 mm2
10.An L-shape is made from a 22 cm by 10 cm rectangle joined to a 13 cm by 6 cm rectangle. Find the total area.
Answer: 298 cm2
- Rectangle 1: 22 × 10 = 220
- Rectangle 2: 13 × 6 = 78
- Total: 220 + 78 = 298 cm2
Marking tips
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