# Finite Curvature

- Author:
- Alexis Doval

Lemma 11 from Newton's Principia was used to find the circle that defines the finite curvature at the point of contact (A) with the continuous curve BC. The endpoints of the curve and "handles" can be moved to alter the curve. Moving the tangent point will move the circle along the curve and the circle's rdius will adjust to give the finite curvature at any point on the curve.