Question 945109
LET THE NUMBER OF SIDES BE N.
 THE SUM OF INTERIOR ANGLES OF A N SIDED POLYGON ={{{(N-2)*180}}}
 
 GIVEN ONE ANGLE IS 126 DEGREE
  REMAINING NO OF ANGLES =N-1,AND THEY'RE EACH 162 DEGREE
  
   THAT IS,{{{(N-2)*180}}}={{{126+162(N-1)}}}
     
   ON SOLVING,N=18...

   HOPE THIS HELPS!!!!!!