In a triangle ABC, D is the midpoint of BC. Join AD. Angle ADB = 45 degree and angle ACB = 30 degree. Find angle ABC.

(In reply to re(2): An algebraic solution by Eric)

The devil is in the details, they say!  Also, all's well that ends well.

The similar triangle approach using only the 30-60-90 and 45-45-90 triangle side ratios is quite basic and renders this problem more interesting than many who rated it seem to think.

Edited on February 27, 2006, 9:32 pm

Posted by Richard on 2006-02-26 14:04:15