13 m

56.0⁰

43.1⁰

38.4⁰

A = (6.08, 3.26)
B = (4.5, 6.42)
a = Segment(A, B)
C = (8.4, 7.38)
b = Segment(B, C)
c = Segment(C, A)
d = Line(A, B)
D = Point(d)
e = Line(C, D)
α = Angle(C, A, B)
β = Angle(B, C, A)
f = Segment(D, C)
g = Segment(B, D)
γ = Angle(D, C, B)