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z pitagorasa:
x=√3,2²-1²=√10,24-1=√9,24= około 3,04m
odp. A
a = 1 m
b = x m
c = 3,2 m
a² + b² = c²
1² + x² = (3,2)²
1 + x² = 10,24
x² = 10,24 - 1
x² = 9,24
x = √(9,24)
x≈ 3,04 m
Więc odpowiedź A