π/6

π/4

π/3

π/2

-π/6

-π/4

-π/3

-π/2

-2π/3

-3π/4

-5π/6

-π

2π/3

3π/4

5π/6

π

Mesure principale d'un angle 

Placer les étiquettes

A = Intersect(xAxis, yAxis)
c = Circle(A, 1.0)
B = Point(c)
C, D = Intersect(c, xAxis)
a = Segment(C, D)
α = Angle(D, A, B)
b = Segment(A, B)
β = Angle(B, A, D)
d = OrthogonalLine(B, yAxis)
e = OrthogonalLine(B, xAxis)
E = Intersect(e, xAxis)
F = Intersect(e, yAxis)
G = Intersect(yAxis, d)
f = Segment(G, B)
g = Segment(B, E)
liste1 = Sequence((cos(i * 3.141592653589793 / 180.0), sin(i * 3.141592653589793 / 180.0)), i, 0.0, 360.0, 5.0)
liste2 = Sequence((0.95 * cos(i * 3.141592653589793 / 180.0), 0.95 * sin(i * 3.141592653589793 / 180.0)), i, 0.0, 360.0, 5.0)
liste3 = Sequence((0.9 * cos(i * 3.141592653589793 / 180.0), 0.9 * sin(i * 3.141592653589793 / 180.0)), i, 0.0, 360.0, 10.0)
liste5 = Sequence(Segment[Element[liste1, 2.0 * i - 1.0], Element[liste3, i]], i, 1.0, 36.0, 1.0)
liste4 = Sequence(Segment[Element[liste1, 2.0 * i], Element[liste2, 2.0 * i]], i, 1.0, 36.0, 1.0)