Questions no. 3 please help Share with your friends Share 0 Pushandeep Sengupta answered this Dear student, Let number of sides of polygon =nWe know sum of exterior angles of a polygon= 360 degreesIf each exterior angle= 72 degreesThen each exterior angle × number of sides= sum of exterior angles of a polygon(For regular polygon)So 72×n= 360 n=36072= 5As there are 5 sides in the regular polygon, it is a pentagon.So 2) is correct Regards 0 View Full Answer