Calculate Circular Arc
Calculator for the length of arc and chord, of radius and angle, in a circle. A circular arc is that part of the circular line, which is enclosed by an angle starting at the origin of the circle. Please enter two values (not c and l), the other two values will be calculated.
c = 2 * sin(α/2) * r
l = α/360° * π * r
Here you can convert radian into degrees.