r

r cos(α)

r tan(α)

r sin(α)

Winkel im Bogenmaß

Merke:\
2\pi = 360°\
\pi= 180°\
\frac{\pi}{2}=90°\
1\approx 57°

1°=\frac{\pi}{180}

r = 1.1 (slider from 0.1 to 5, step 0.1)
O = Intersect(xAxis, yAxis)
c_1 = Circle(O, r)
P = Point(c_1)
B = Intersect(c_1, xAxis, 2)
α = Angle(B, O, P)
r_{1} = Segment(O, P)
g = OrthogonalLine(P, xAxis)
h = OrthogonalLine(P, yAxis)
A = Intersect(h, yAxis)
co = Segment(A, P)
f = OrthogonalLine(B, xAxis)
i = Ray(O, P)
Ta = Intersect(f, i)
ta = Segment(B, Ta)
D = Intersect(g, xAxis)
si = Segment(P, D)
b = CircleArc(O, B, P)
a: b / r
Text1: "Winkel:\\
\alpha = \frac{b}{r} =\frac{" + (LaTeX[b]) + "}{" + (LaTeX[r]) + "} =" + (LaTeX[a]) + "= " + (LaTeX[α]) + ""