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(x/2)² + (√3x/2)²= 100
x²/4 + 3x²/4 = 100
x² + 3x² =400
4x²=400
x²=100
x=10
jedna przekatna ma 10 druga 10√3
P=(d * d')/2
P=10 * 10√3 /2
P=50√3