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Determinati raza cercului inscris in triunghiul ABC in care AB=AC=15 si BC=24.​

Răspuns :

p=(AB+BC+BC)/2=(15+15+24)/2=54/2=27 u

S=√p(p-AB)(p-BC)(p-AC)=√27(27-15)(27-24)(27-15)=√(27*12*3*12)=√11664=108 u²

S=p*r=>r=S/p=108/27=4 u