1-В)
2-A) <1+<2=180, <1-<2=40, <1=<2+40, 2*2<2=180-40=140, <2=70, <1=180-70=110
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1-В)
2-A) <1+<2=180, <1-<2=40, <1=<2+40, 2*2<2=180-40=140, <2=70, <1=180-70=110