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A circle with center O. 3 points A, B, and C are on the circumference. A line each slopes downward to the left and downward to the right from O to A and C. Line rises from O to B. Line runs from A to B and from B to C. Angle at B is 70 degrees.

In the diagram, point O is the center of the circle. If the measure of angle ABC = 70°, what is the measure of angle AOC?

A. 100°
B. 110°
C. 140°
D. 130°

3 answers

D. 130°
What is the correct answer?
The correct answer is D. 130°.
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