Cointerior Angles
Author: Simon Job
Date: July 17, 2009

Cointerior angles on parallel lines.

Cointerior Angles

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Show blue

A = (-3.78, 0.5)
B = (7.96, 0.62)
a = Line(A, B)
C = (-3.74, 3)
b = Line(C, a)
D = (3.3200000000000003, 4.78)
E = (0.5, -2.48)
c = Segment(D, E)
F = Intersect(a, c)
G = Intersect(b, c)
α = Angle(C, G, E)
H = Point(b)
δ = Angle(B, F, D)
ζ = Angle(D, F, A)
θ = Angle(E, G, H)
text2: "Green angle sum =
 " + α + " + " + ζ + " = " + (α + ζ)
text3: "Blue angle sum =
 " + θ + " + " + δ + " = " + (δ + θ)
d = true
e = true