Question 946260

angle {{{C = 60}}} and angle {{{A}}} is two times angle {{{B}}}:so, {{{A=2B}}}

in triangle {{{A+B+C=180}}}

{{{2B+B+60=180}}}

{{{3B=180-60}}}

{{{3B=120}}}

{{{highlight(B=40)}}}

then

{{{A=2B}}}

{{{A=2*40}}}

{{{highlight(A=80)}}}