пусть ∠TAC=a ∠FCA=c
a+c+∠AOC=180 a+c=180-115=65
∠A+∠C= 2*(a+c)=130
∠B=180-∠A-∠C=180-130=50
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пусть ∠TAC=a ∠FCA=c
a+c+∠AOC=180 a+c=180-115=65
∠A+∠C= 2*(a+c)=130
∠B=180-∠A-∠C=180-130=50