c = 8.4 (slider from 0 to 10, step 0.2)
b = 5.4 (slider from 0 to 10, step 0.2)
a = 5.2 (slider from 0 to 10, step 0.2)
A = (0, 0)
d = Circle(A, c)
B = Point(d)
e = Circle(A, b)
f = Circle(B, a)
C, D = Intersect(e, f)
Polygon1, b_1, a_1, c_1 = Polygon(A, C, B)