c>a

bewege k

a = 4
O = Intersect(xAxis, yAxis)
c = 3
k = 5 (slider from 1 to 12, step 1)
C: (a, 0)
kr = Circle(C, c)
Q = Point(kr)
l = Line(Q, O)
e = Circle(Q, k)
P', P = Intersect(e, l)
loc1 = Locus(P, Q)
loc2 = Locus(P', Q)