What is the formula for approximating the Segment Edge Length?

What is the formula for approximating the Segment Edge Length?

Answer: SEL = Circumference divided by segments = (Pi * Diameter) * segments. Example SEL of 8″ diameter 12-segment ring: SEL = (3.1416 * 8) ÷ 12 = 25.1328 ÷ 12 = 2.09″. Cutting Angle = (360 ÷ 12) ÷ 2) = 15°