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P=1/2*6*8=3*8=24
(6+8+10)/2*r=24
12r=24 /:12
r=2
2)
6,5,5
p=(6+5+5)/2=8
P=Pierwiastek[8*(8-5)(8-5)(8-6)]
P=pierwiastek{8*3*3*2]
P=pierwiastek[16*9
P=4*3=12
P={(a+b+c)/2}*r
8r=12 /8
r=3/2