360
360 divided by 5 is 72. 360/5=72
360 divided 6 = 60
exterior angle of regular polygon is always 360 divided by number of sides, so number of sides = 360 divided by exterior angle, in this case 360/32.72 ie 11.
20
72
2
45
20
5
360 divided by 3/4 is 480.
360 divided into the ratio of 45 = 8