Odpowiedź (w mm²):
1. 350
1cm × 2cm = 2cm²
2cm × 1,5cm : 2 = 1,5cm²
2cm² + 1,5cm² = 3,5cm²
2. 500
2,5cm × 2,5cm = 6,25cm²
1cm × 2,5cm : 2 = 1,25cm²
6,25cm² - 1,25cm² = 5cm²
3. 650
0,5cm × 2cm = 1cm²
3,5cm × 2cm : 2 = 3,5cm²
4cm × 1cm = 2cm²
1cm² + 3,5cm² + 2cm² = 6,5cm²
4. 375
2,5cm × 3cm : 2 = 3,75cm²
5. 600
1cm × 3cm = 3cm²
1,5cm × 1cm : 2 = 0,75cm²
3cm × 1,5cm = 2,25cm²
3cm² + 0,75cm² + 2,25cm² = 6cm²
6. 450
6cm × 1,5 : 2 = 4,5cm²
7. 675
4,5cm × 1cm = 4,5cm²
1cm × 4,5cm : 2 = 2,25cm²
4,5cm² + 2,25cm² = 6,75cm²
8. 1225
2,5cm × 3,5cm = 8,75cm²
2 × (3,5cm × 1cm : 2) = 3,5cm²
8,75cm² + 3,5cm² = 12,25cm²
9. 575
3 × (1cm × 1cm) = 3cm²
2cm × 1cm : 2 = 1cm²
3 × (0,5cm × 0,5cm) = 0,75cm²
1cm × 1,5cm : 2 = 0,75cm²
1cm × 0,5cm : 2 = 0,25cm²
3cm² + 1cm² + 0,75cm² + 0,75cm² + 0,25cm² = 5,75cm²
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jeśli ci pomogłem proszę o naj...
