Keywords: Circle and cubic bezier.svg Bézier spline approximation in red overlayed on a black circle of radius 112 units with tangent on-curve control points drawn as squares and off-curve control points drawn as circles The spline's on-curve control points are placed at the circle's horizontal and vertical tangent points Off-curve control points are placed on these tangent lines <math>\frac 4 3 \left \frac 1 - \cos45 \circ \sin 45 \circ \right \times 112 \frac 4 3 \sqrt 2 -1 \times112 62</math> units from the on-curve control points own Damian Yerrick Splines Circle geometry |