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![Geometry Problems, Online Education](../problem/h_geometry_problem_910.jpg)
Problem 859: Isosceles Right Triangle, Angles,18, 45 Degrees,
Congruence, Perpendicular bisector. Level: High School, SAT Prep, College geometry
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The figure shows an isosceles right triangle ABC.
EF is the perpendicular bisector of BC, AB=BC=AD=DE=DF and angle
BAD = 18 degrees. Find the measure of angle BDF. Problem submitted by Charles T.
![Problem 859: Isosceles Right Triangle, Angles,18, 45 Degrees, Congruence, Perpendicular bisector, Auxiliary Lines](p859-triangle-angle-45-18-degrees-congruence.gif)
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