Quad's interior angles
Author: Scott Farrar

Cut the Quadrilateral

Given alternate interior angles are congruent,
the sum of the interior angles in a quadrilateral is 360°

A = (-0.96, -0.42)
B = (1.58, 2.86)
C = (7.94, 1.7)
D = (1.16, -2.36)
poly1, a, b, c, d = Polygon(A, B, C, D)
e = Segment(A, C)
f = Line(B, e)
E = Point(f)
F = Point(f)
g = Line(D, e)
G = Point(g)
H = Point(g)
α = Angle(E, B, A)
β = Angle(C, B, F)
γ = Angle(B, C, A)
δ = Angle(B, A, C)
ε = Angle(A, D, G)
ζ = Angle(C, D, H)
η = Angle(C, A, D)
θ = Angle(D, C, A)
ι = Angle(E, B, F)
κ = Angle(H, D, G)
h = Segment(E, F)
i = Segment(G, H)
j = false