Ответ:
R=a*b*c/4S
s=√p(p-a)(p-b)(p-c)=√52*12*1*39=√24336=156
R=13*40*51/4*156=42,5
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Ответ:
R=a*b*c/4S
s=√p(p-a)(p-b)(p-c)=√52*12*1*39=√24336=156
R=13*40*51/4*156=42,5