Sagot :
1. A = 60 m²
SOL:
- A = B × H
- A = 8 × 7.5
- A = 60
2. A = 39 m²
SOL:
- A = B × H
- A = 7.5 × 5.2
- A = 39
3. A = 140 cm²
SOL:
- A = B × H
- A = 10 × 14
- A = 140
4. A = 240 cm²
SOL:
- A = B × H
- A = 20 × 12
- A = 240
5. A = 15 cm²
SOL:
- A = B × H
- A = 5 × 3
- A = 15