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![Geometry Problems, Online Education](../problem/h_geometry_problem_910.jpg)
Problem 858: Isosceles Right Triangle, Cevian, Ratio 2:1, 45 Degrees,
Congruence, Angles, Auxiliary Lines. Level: High School, SAT Prep, College geometry
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The figure shows an isosceles right triangle ABC with
a point D on AC. If AD = 2 DC, find the measure of angle ADB.
Try to use elementary geometry (no
trigonometry).
![Triangle, Median, Midpoint, Angles, 30, 45 Degrees, Congruence, Auxiliary Lines](p858-isosceles-right-triangle-angle.gif)
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Geometry Problem 859
Isosceles Right Triangle, Angles,18, 45 Degrees, Congruence, Perpendicular bisector. |
![Problem 856: Triangle, Median, Midpoint, Angles, 30, 45 Degrees, Congruence, Auxiliary Lines](../school-college/p857-triangle-median-midpoint-angle-30-degrees-1.jpg) |
Geometry Problem 857
Triangle, Median, Midpoint, Angles, 30, 45 Degrees, Congruence, Auxiliary Lines. |
![Problem 856: Quadrilateral, Diagonals, Triangle, Angles, 30 degrees, Congruence, Auxiliary lines](../school-college/p856-quadrilateral-triangle-angle-30-degrees-diagonal-1.jpg) |
Geometry Problem 856
Quadrilateral, Diagonals, Triangle, Angles, 30 degrees, Congruence, Auxiliary lines. |
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