Locus with more restriction
There are many problems in Geometry that have some restrictions and conditions on points.
For example: Prove that if incenter (I) of triangle ABC lies on its Euler Line, then the triangle is isosceles.
Assuming that points B, C of the triangle are fixed, and A is moving, how can I find the locus of all A that satisfy the condition? (The locus may be just one point or more...)
Here's my trial:
Or may be define a point P:
P = If(AreCollinear(H,I,O),A), A)
Then whenever P gets defined, a sort of a picture of it is captured and saved as point P_0 for example (I think this is possible by SetCoords() onUpdate)