2(х+10+x)=180
4x+20=180
4x=160
x=40
B=C=2*40=80
A=D=2*(40+10)=2*50=100
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2(х+10+x)=180
4x+20=180
4x=160
x=40
B=C=2*40=80
A=D=2*(40+10)=2*50=100