r

r

r

Radius r

Radius (ohne r)

r

r

weitere Radien

Winkel gleichseitiges Dreieck

Winkel BAD

\overset{\LARGE{\frown}}{BD}

Kreisbogen BD

O = (-18, 4)
r_1 = 3.4 (slider from 0 to 5)
c = Circle(O, r_1)
B = Point(c)
B' = Rotate(B, 50°, O)
α = Angle(B, O, B')
f = Line(O, B')
g = Segment(B, O)
A_1, C = Intersect(c, f)
d = Circle(C, O)
D_1, D = Intersect(d, c)
h = Segment(C, D)
r = Segment(O, C)
A = Point(c)
i = Segment(B, A)
j = Segment(A, D)
a = false
k = Segment(B, O)
l = Segment(O, C)
m = Segment(C, D)
b = true
n = Segment(O, A)
p = Segment(O, D)
e = false
q = CircleArc(O, B, D)
β = Angle(D, C, O)
γ = Angle(C, O, D)
δ = Angle(O, D, C)
s = false
ε = Angle(B, A, D)
t = false
o = false