Question 1202242
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It is a  FATAL  MISTAKE  to formulate the problem as it is made in your post.


Based on given info,  which defines three angles of a triangle and nothing more,
it is  IMPOSSIBLE  to find any of its side.



The Math composer,  who created it,  simply  DOES  NOT  KNOW  the basics of Geometry.


The number of such  " Math composers "  at this forum is about a million, 

and I see and disprove their compositions here at this forum practically  EVERY  DAY


                      (to keep Internet clean).



As a rule,  they know and understand  NOTHING  in  Math,  but want very much to teach others.