Alternate Interior Angles -- When are they congruent?

www.scottfarrar.com

twitter @farrarscott

Compare Angles

Compare Lines

Are the angles congruent?

The Congruent Game:
How close to congruent can you
make the angles?

Get My Score!!

A = (-1, 1)
B = (7, 3)
a = Line(A, B)
C = (-1, 5)
Drag = (11.752892561983483, 7.298181818181808)
b = Line(C, Drag)
E = (-1, -1)
F = (4.46, 8.1)
c = Line(E, F)
G = Intersect(b, c)
H = Intersect(a, c)
α = Angle(C, G, H)
β = Angle(a, c)
γ: abs(α - β)
J = (-0.16363636363636375, -5.018181818181818)
K = (5.2183471074380225, -3.8436363636363797)
g = Segment(J, K)
K' = Rotate(K, α, J)
δ = Angle(K, J, K')
K'_1 = Rotate(K, β, J)
ε = Angle(K, J, K'_1)
d = CircleSector(J, K, K')
e = CircleSector(J, K, K'_1)
f = Line(A, b)
h = false
i = false
j: γ / °
k: floor(-2000 + (2000 * 1.2^(1 / j)))
D = (11.812892561983483, -3.381818181818204)
text3 = Text(("Score:" * k), D)