Odpowiedź:
A. P = 15cm × x
x² + 15² = 17²
x² = 289 - 225
x² = 64
x = 8
P = 15cm × 8cm = 120cm² (IV)
B. P = 8cm × x
x² + 8² = 12²
x² = 144 - 64
x² = 80 = 4×4×5
x = 4×(pierwiastek z 5)
x = pierwiastek z 80
P = 8cm × 4×(pierwiastek z 5)cm
P = 32×(pierwiastek z 5)cm²
P = 8×(pierwiastek z 80)cm² (II)
C. P = 9cm × x
x² + 9² = 15²
x² = 225 - 81
x² = 144
x = 12
P = 9cm × 12cm = 108cm² (III)
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Odpowiedź:
A. P = 15cm × x
x² + 15² = 17²
x² = 289 - 225
x² = 64
x = 8
P = 15cm × 8cm = 120cm² (IV)
B. P = 8cm × x
x² + 8² = 12²
x² = 144 - 64
x² = 80 = 4×4×5
x = 4×(pierwiastek z 5)
x = pierwiastek z 80
P = 8cm × 4×(pierwiastek z 5)cm
P = 32×(pierwiastek z 5)cm²
P = 8×(pierwiastek z 80)cm² (II)
C. P = 9cm × x
x² + 9² = 15²
x² = 225 - 81
x² = 144
x = 12
P = 9cm × 12cm = 108cm² (III)