because I guess for these you need to draw 2 shapes. It's really interesting - If the number of points is an even number which is the multiple of two other even numbers (8, 12, 16, 20 etc), the above formula works if the angle to turn is 180 - (180/(Number of Points/2)), but this doesn't work if the number of points is an even number which is a multiple of an even number and an odd number (6, 10, 14, 18 etc). Angle at centre of pentagon = 1/5 of 360 Angle at circumference (point of star) is half of this Angle to turn is 180 minus this angle. Scratch-Minion wrote:Angle to turn = 180 - (180/Number of Points) * Number of Points must be an odd number!! This is the same as Angle to turn = 180 - ((360/amount of points)/2) I drew a pentagon in a circle and noted that “the angle subtended by an arc at the centre of a circle is twice the angle subtended at the circumference” to do the calculation.
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