Phương trình đường tròn

(x-a)² + (y-b)² = R²

R = 2.4 (slider from 0 to 15, step 0.1)
I = (3.249869243671757, 2.9051936037676445)
c = Circle(I, R)
M = Point(c)
a_1 = Segment(M, I)
b_1 = OrthogonalLine(I, xAxis)
d = OrthogonalLine(I, yAxis)
b = Intersect(d, yAxis)
a = Intersect(b_1, xAxis)
e = Segment(I, b)
f = Segment(I, a)