Question

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Answer 1

I.   in situatia initiala x²=10² -7²   adica  x = √(51) ;
II.  daca  AB devine 7-2=5m
     atunci , BC² =5² + √(51)² = 25 + 51 = 76
                  BC= √76 = 2√19 ≈ 8,72 m ;