Parabola Construction 7
Author: M. Dabbs, R. Walcott

Drag the generator point G.

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A_1 = (-3.38, 1.2)
B = (10.5, 1.2)
a = Line(A_1, B)
A = Point(a)
b = OrthogonalLine(A, a)
C = Point(b)
c = Circle(C, A)
G = Point(c)
d = Line(C, G)
e = OrthogonalLine(G, d)
D = Intersect(e, a)
f = Line(C, D)
g = OrthogonalLine(D, f)
E = Intersect(g, d)
loc1 = Locus(E, G)
h = Circle(E, G)
α = Angle(E, D, C)