Question 1155049
That would be a <em>regular</em> polygon.

x is the exterior angle

x + 3x = 180
   4x = 180
    x = 45  
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Note that for a regular polygon with exterior angle {{{ theta}}},  
number_of_sides = {{{ 360/theta }}}
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A regular polygon with exterior angles of 45 degrees has 
   360/45 =  {{{ highlight( 8  ) }}} sides