Question 1130411

on given image, you can see two equal sides in triangle with given angle of {{{62}}}°

it means < {{{1}}} = {{{62}}}° too

then  < {{{2}}} = {{{180-(62+62)}}}

 < {{{2}}} = {{{56}}}°

since angles {{{2}}} and {{{3}}} lie on straight line, their sum is {{{180}}}

<{{{2}}}+ <{{{3}}} ={{{180}}} ..........substitute  < {{{2}}} = {{{56}}}°

{{{56}}}+ <{{{3}}} ={{{180}}}

<{{{3}}} ={{{180-56}}}

<{{{3}}} ={{{124}}}°

and, <{{{4}}} ={{{180-(124+18)}}}
<{{{4}}} ={{{180-142}}}
<{{{4}}} ={{{38}}}°