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OpenStudy (anonymous):
In the diagram, AC¯¯¯¯¯ is a diameter of the circle with center O. If m∠ACB = 50°, what is m∠BAC? A.50 B.40 C.80 D.100
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OpenStudy (anonymous):
OpenStudy (alekos):
The angle subtended by the diameter of a circle is always 90 degrees, so from here you can work it out
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