> "Suppose you are given a triangle ABC with sides AB equals AC. > Draw a line from C to side AB. Call the line CD. Now draw a > line from B to side AC. Call the line BE. If angle EBC equals > 60 degrees, angle BCD equals 70 degrees, angle ABE equals 20 > degrees and angle DCE equals 10 degrees, find what angle EDC > is."
I need a (gentle) hint! Please email to firstname.lastname@example.org