nội trú

ngoại trú

bán trú

A = (-60.63229233402814, -14.382422236985093)
B = (-56.79212433291502, -14.356739843580824)
a = Segment(A, B)
c = Semicircle(A, B)
C = Midpoint(a)
B' = Rotate(B, 30.0*°, C)
α = Angle(B, C, B')
b = Segment(C, B')
B'' = Rotate(B', 90.0*°, C)
β = Angle(B', C, B'')
d = Segment(C, B'')