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a = 3√2
b² = a²+a²
b² = 2*a²
b² = 2*18 =36
b = 6
Ob Δ = a+a+b = 2*3√2 + 6 = 6√2 + 6
Trójkąt drugi
d = 4 = a√2
a=2√2
Ob Δ = a+a+d = 2*2√2 + 4 = 4√2+4