Question 940069
 sum of all angles in a pentagon  = 540 degrees
 given angles  = x,2x,3x,4x,5x
 sum  = x+2x+3x+4x+5x
    =15 x
 15x =540
  divide with 15 0n both sides
 {{{ 15 x/15 =540/15}}}
   {{{ x=  36 degrees}}}
 smallest angle  = 36 degrees