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 306090 and 454590
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 20060226 14:04:15 