OK=d  απόσταση του Ο από την ευθεία ε

ρ = 3 (slider from 0 to 10, step 1)
d = 4 (slider from 0 to 15, step 1)
O = (5.48, 2.4)
c = Circle(O, ρ)
K = Point(Circle[O, d])
f = Segment(O, K)
ε = OrthogonalLine(K, f)