8th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 8th Grade area & perimeter worksheet.
Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Area & Perimeter8th Grade Area and Perimeter Worksheet — Level 3 — Practice Set 2 — Answers
Write the formula, substitute, then calculate. Include units.
1.A rectangle is 6 m long and 3 m wide. Find its area.
Answer: 18 m2
- A = length × width = 6 × 3
- = 18 m2
2.A triangle has a base of 19 mm and a height of 10 mm. Find its area.
Answer: 95 mm2
- A = ½ × base × height = ½ × 19 × 10
- = 95 mm2
3.A triangle has a base of 12 cm and a height of 7 cm. Find its area.
Answer: 42 cm2
- A = ½ × base × height = ½ × 12 × 7
- = 42 cm2
4.An L-shape is made from a 15 mm by 6 mm rectangle joined to a 10 mm by 9 mm rectangle. Find the total area.
Answer: 180 mm2
- Rectangle 1: 15 × 6 = 90
- Rectangle 2: 10 × 9 = 90
- Total: 90 + 90 = 180 mm2
5.An L-shape is made from a 13 m by 3 m rectangle joined to a 10 m by 4 m rectangle. Find the total area.
Answer: 79 m2
- Rectangle 1: 13 × 3 = 39
- Rectangle 2: 10 × 4 = 40
- Total: 39 + 40 = 79 m2
6.An L-shape is made from a 17 cm by 13 cm rectangle joined to a 7 cm by 5 cm rectangle. Find the total area.
Answer: 256 cm2
- Rectangle 1: 17 × 13 = 221
- Rectangle 2: 7 × 5 = 35
- Total: 221 + 35 = 256 cm2
7.A rectangle is 22 mm long and 18 mm wide. Find its area.
Answer: 396 mm2
- A = length × width = 22 × 18
- = 396 mm2
8.A triangle has a base of 7 mm and a height of 3 mm. Find its area.
Answer: 10.5 mm2
- A = ½ × base × height = ½ × 7 × 3
- = 10.5 mm2
9.An L-shape is made from a 9 mm by 11 mm rectangle joined to a 2 mm by 15 mm rectangle. Find the total area.
Answer: 129 mm2
- Rectangle 1: 9 × 11 = 99
- Rectangle 2: 2 × 15 = 30
- Total: 99 + 30 = 129 mm2
10.An L-shape is made from a 19 mm by 14 mm rectangle joined to a 7 mm by 15 mm rectangle. Find the total area.
Answer: 371 mm2
- Rectangle 1: 19 × 14 = 266
- Rectangle 2: 7 × 15 = 105
- Total: 266 + 105 = 371 mm2
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