[tex]A+B+C+D=360\textdegree[/tex]
[tex]2A=3B=4C=6D=k[/tex]
[tex]2A=k=\textgreater A=\frac{k}{2}[/tex]
[tex]3B=k =\textgreater B=\frac{k}{3}[/tex]
[tex]4C=k =\textgreater C=\frac{k}{4}[/tex]
[tex]6D=k =\textgreater D=\frac{k}{6}[/tex]
[tex]\frac{k}{2}+\frac{k}{3}+\frac{k}{4}+\frac{k}{6}=360\textdegree[/tex]
[tex]\frac{6k+4k+3k+2k}{12}=360\textdegree[/tex]
[tex]\frac{15k}{12}=360\textdegree[/tex]
[tex]k=\frac{360\textdegree*12}{15}=288\textdegree[/tex]
[tex]A=\frac{k}{2}=144\textdegree[/tex]
[tex]B=\frac{k}{3}=96\textdegree[/tex]
[tex]C=\frac{k}{4}=72\textdegree[/tex]
[tex]D=\frac{k}{6}=48\textdegree[/tex]