Chapitre 7 exo 84 le 31-5-19

X

I = (1, 0)
N = (-1, 0)
O: (0, 0)
c = Semicircle(N, I)
X = 0.9 (slider from 0 to π, step 0.01)
M: (cos(X), sin(X))
d = CircleSector(O, I, N)
t1, i, n, m = Polygon(N, M, I)
α = Angle(I, O, M)
f = Segment(O, M)