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Mathematics 12 Online
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

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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