sujet 12 avec geogebra
Author: benjamin Clerc

O = Intersect(xAxis, yAxis)
S = Point(xAxis)
M = (0, 8)
a = Ray(O, S)
b = Ray(O, M)
A1 = Point(b)
c = Segment(O, A1)
A = Point(c)
d = Circle(A, 6)
C = Intersect(d, a, 1)
e = Segment(A, C)
I = Midpoint(e)
f = Circle(A, 3)
g = Circle(I, A)
B = Intersect(f, g, 1)
h = Segment(A, B)
i = Segment(B, C)
j = Segment(A, I)
k = Segment(I, C)
α = Angle(A, B, C)