Let’s solve each problem one by one. We’ll calculate area and perimeter for each shape using the correct formulas.
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Problem 1: Rectangle (10m long, 4m wide)
- Area of rectangle = length × width
→ 10 × 4 =
40 m²
- Perimeter of rectangle = 2 × (length + width)
→ 2 × (10 + 4) = 2 × 14 =
28 m
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Problem 2: Triangle (base 9m, height 6m)
- Area of triangle = (base × height) ÷ 2
→ (9 × 6) ÷ 2 = 54 ÷ 2 =
27 m²
*(Note: For perimeter, we’d need all three sides — but only base and height are given. So we can’t find perimeter here. The worksheet probably expects only area for this one.)*
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Problem 3: Square (side 7m)
- Area of square = side × side
→ 7 × 7 =
49 m²
- Perimeter of square = 4 × side
→ 4 × 7 =
28 m
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Problem 4: Triangle (base 8m, height 12m)
- Area = (base × height) ÷ 2
→ (8 × 12) ÷ 2 = 96 ÷ 2 =
48 m²
*(Again, no other side lengths given → can’t find perimeter. Only area is expected.)*
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Problem 5: Rectangle (20m long, 7m wide)
- Area = 20 × 7 =
140 m²
- Perimeter = 2 × (20 + 7) = 2 × 27 =
54 m
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Problem 6: Rectangle (11m long, 8m wide)
- Area = 11 × 8 =
88 m²
- Perimeter = 2 × (11 + 8) = 2 × 19 =
38 m
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Final Answer:
1. Area: 40 m², Perimeter: 28 m
2. Area: 27 m²
3. Area: 49 m², Perimeter: 28 m
4. Area: 48 m²
5. Area: 140 m², Perimeter: 54 m
6. Area: 88 m², Perimeter: 38 m
Parent Tip: Review the logic above to help your child master the concept of area worksheet for.
