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KL=LM=9cm
KL=9*2/3=6cm
½KL=½*6cm=3cm
Szukane: h=?
Wzory: h²+(½KL)²=ML² (twierdzenie pitagorasa)
oblicznia: 9²=h²+3²
81-9=h²
72=h²
h=6√2 [cm]