<А=<С=х
<В=<D=29х
x+x+29x+29x=180
60x=180
x=3
<А=<С=3°
<В=<D=29*3°=87°
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<А=<С=х
<В=<D=29х
x+x+29x+29x=180
60x=180
x=3
<А=<С=3°
<В=<D=29*3°=87°