α = 1.1868238913561442 rad (slider from 0 to 3.141592653589793, step 0.017453292519943295)
A = (17.501386568874878, 3.9506356163837077)
B = (15.758389880694317, -0.03335681374329325)
C = (21.84109260883462, -1.527353975040919)
đa giác1, c, a, b = Polygon(A, B, C)
D = (9.853543957470368, -3.8394924389539105)
A' = Rotate(A, α, D)
B' = Rotate(B, α, D)
C' = Rotate(C, α, D)
đa giác1', c', a', b' = Polygon(A', B', C')
d = Segment(B, D)
e = Segment(C, D)
f = Segment(A, D)
g = Segment(C', D)
h = Segment(B', D)
i = Segment(D, A')
k = CircleArc(D, C, C')
p = CircleArc(D, A, A')
q = CircleArc(D, B, B')
E = (-14.655123760007344, -6.578487234666224)
F = (-11.702700798395371, -6.6140585956495)
j = Segment(E, F)
I = (-3.4501450502751534, 6.582916329146191)
r = Circle(I, j)
H = (-5.975711680087806, -0.5313558675091684)
r' = Rotate(r, -(α), H)
I' = Rotate(I, -(α), H)
l = Segment(I, H)
m = Segment(H, I')
s = CircleArc(H, I', I)
G = Point(r)
n = Segment(I, G)
J = Point(r')
t = Segment(I', J)