Math Education Geometry Problem 985: ircle, Radius, Perpendicular, Concentric Circles, Congruence. Level: School, College, Mathematics Education. Distance learning.

Online Geometry Problem 986: Triangle, Median, Midpoint, Equal Angles, 45 Degrees. Level: High School, College, Mathematics Education

The figure below shows a triangle ABC with the median BD such that angles A and DBC are equal. If angle BDC is 45 degrees, find the measure of angle A. Try to use elementary geometry (Euclid's Elements.)

Geometry Problem 985: Triangle, Median, Midpoint, Equal Angles, 45 Degrees