a = 3.1 (slider from -10 to 10)
b = -2.4 (slider from -10 to 10)
r = 1 (slider from 0 to 5)
A = Intersect(xAxis, yAxis)
c_1 = Circle(A, r)
e: (x / a)^(2) + (y / b)^(2) = 1
h: (x / a)^(2) - (y / b)^(2) = 1
c: sqrt(a^(2) + b^(2))
d: sqrt(a^(2) - b^(2))
F_1: ((-c), 0)
F_2: (c, 0)
G_1: ((-d), 0)
G_2: (d, 0)