Alusta

Peata

A = (6.94, 5.26)
B = (10.66, 6.1)
a = 4.799655442984406 rad (slider from 0 to 6.283185307179586, step 5°)
C = Rotate(B, a, A)
α = Angle(B, A, C)
c = Circle(C, A)