Problem 394: Square, 90 Degree Arc, Diagonal,
Congruence
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about: Triangle, Orthocenter, Circumcircles, Congruence, Collinear, Online
Learning.
The figure shows a square ABCD. Arc BD with
center at A and AC intersect at F. The extension of DF meets BC at G.
Prove that BG = 2.EF. .
