radius of curvature

Determination of the radius of curvature R of the upper belt of the arch (arc, in general) in size L and the passage of the boom lift f. This is useful when you want to build an arch in some design programs. In addition to R, in Lear still required parameters φ1 and φ2 - to set the angles forming the segment of a circle, which are also calculated here.     XA, ZA - coordinates of the center of the circle (to control - the left pivot point after the construction of the arch must have zero coordinates)

Calculation Reference
Geometry