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b=?
c=√19
√19(do kwadratu)+b(do kwadratu)=10(do kwadratu)
19+b(do kwadratu)=100
b(do kwadratu)=81
b=9
podstawa trojkata=2*9=18
(2x)² + (√19)² = 10²
4x² = 100 - 19
4x² = 81 /:4
x² = 20,25
x = √20,25
x= 4,5