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(6,5)² = h² + (6,5 - a)²
5² = h² + a²
po odjęciu stronami:
(6,5)² - 5² = (6,5 - a)² - a²
(6,5 - 5)*(6,5 + 5) = [(6,5 - a) - a]*[(6,5 - a) + a]
1,5*11,5 = (6,5 - 2a)*6,5
17,25 = 42,25 - 13a
13a = 25
a = 25/13
5² = h² + a²
h = √(25 - a²) = √(25 - 625/169) = √(3600/169) = 60/13 = 4 8/13
jak masz pytania to pisz na pw