Angles in a Right Angle

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A = (-1.76, -0.02)
B = (6.7, -0.04)
a = Line(A, B)
b = OrthogonalLine(A, a)
C = Point(b)
c = Segment(C, A)
d = Segment(A, B)
α = Angle(B, A, C)
D = (1.48, 3.94)
g = Segment(A, D)
β = Angle(D, A, C)
γ = Angle(B, A, D)
e = true
f = true
h = true
text2: "∠CAD + ∠BAD = " + β + " + " + γ + " = " + (β + γ)