In circle O, AE and DC are chords and intersect at B. If arc AC is 36 degrees and arc DE is 20 degrees, what is the measure of angle ABC? (Type in numbers only)

Answer 1

I find angle ABC =164 degrees. angle AOC is 36 degrees and I conclude angles OCB added to OAB is 160 degrees. The quadrilaateral OABC angles add up to 360 degrees.