The figure below shows an isosceles triangle ABC
with AB = BC, angle B = 20 degrees, D on BC and E on AB. If
angle CAD = 25 degrees and angle ACE = 65 degrees, find the measure of angle
CED.
An "elegant" solution must use only elementary geometry, no
trigonometry.
This entry contributed by email from Anonymous.
See also:
Art of problem 1038.
