jyrkänne

puu

T-216

A = (-30, -5)
B = (-20, -5)
B' = Rotate(B, 41°, A)
α = Angle(B, A, B')
B'_1 = Rotate(B, 54°, A)
β = Angle(B, A, B'_1)
f = Ray(A, B')
g = Ray(A, B'_1)
C = (-20, 0)
h = Ray(B, C)
D = Intersect(h, g)
E = Intersect(f, h)
i = Segment(A, B)
j = Segment(E, B)
k = Segment(D, E)