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x²=36+36
x=√72
x=√36*2
x=2√6
przeciwprostokątna=2√6
P = a²
a² = 18
18 + 18 = b²
b² = 36 więc b = 6
P=½ a*h h=a
P=½a²
18cm²=½a²
a²=½18cm²
a²=9cm²
a=3
tw. pit: (dla tego trojkata)
a²×a²=b²
3²*3²=b²
b=9;D