

Online Geometry Problem 1, Art 01: Triangle, Angles, Midpoint,
Congruence, 45 Degrees, Auxiliary Construction. PicSketch for iPad

In a triangle ABC, median BD is such
that angles A and DBC are equal. If angle ADB is 45 degrees,
prove that the measure of angle A is 30 degrees. Try to use
elementary geometry (Euclid's Elements.)
See
also: Art 00







