Point F moves on circle c = A(AE) and D is the second intersection of the line
from fixed C to F with the circle. Project point C parallel to AD on line AF. Then this projection H lies on an ellipse, whose
center is the middle of AC, points {A,C} being the foci.
- A key feature is the isosceles CHA, which implies the hyperbola property with foci at C, A. - G is the middle of CE, and I is the middle of CJ. Additional properties. - By standard properties of ellipses (see Ellipse.html ) the tangent tH to the ellipse is orthogonal to DF.
![[alogo]](alogo.png){kind=small}
Ellipse Generation ![[0_0]](EllipseGeneratedCircleAndPoint_files/EllipseGeneratedCircleAndPoint_0_0_0.png)