AB

.AB

.BC

CA

AB/BC

Angle

α = 0.08726646259971647 rad (slider from 0 to 90°, step 0.017453292519943295)
n = 4 (slider from 1 to 30, step 1)
A = (8.12, -3.96)
B = Point(Circle[A, n])
f = Segment(A, B)
g = OrthogonalLine(A, f)
A' = Rotate(A, (-α), B)
β = Angle(A', B, A)
h = Ray(B, A')
C = Intersect(g, h)
i = Segment(C, B)
j = Segment(B, A)
k = Segment(A, C)
AB = Distance(A, B)
B2: AB
BC = Distance(B, C)
C2: BC
AC = Distance(A, C)
D2: AC
E2: B2 / C2
texte8: 48°
A2: α
γ = Angle(B, A, C)