halkaisija

sektori

kaari

säde

keskipiste

A = (2.1, 1)
B = (5.52, 1.2)
c = Circle(A, B)
r = Segment(A, B)
C = Point(c)
b = CircleArc(A, B, C)
α = Angle(B, A, C)
f = Segment(A, C)
g = Line(C, A)
D, E = Intersect(c, g)
h = Segment(C, E)