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Algebra.Com
Question 37742: 
in the diagram, two chords of Circle O, AC and BD intersect at E. measure of angle DEC=88 and measure of arc DC= 81. what is the measure of arc AB?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
The inner intersection is the average of the two arcs it cuts off.
Thus if
88 = (1/2)(81 + arc AB)
176 = 81 + arc AB
arc AB = 95 degrees
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