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Help plz and explain

Help plz and explain-example-1

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Sector AC is exactly 1/4 of the whole circle (we know this as the angle of sector AC is 90° - 90°×4=360°). This means that minor arc AC is 1/4 of the measure of the circumference.
36÷4=9
So your answer is A: 9
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User Jason Maldonado
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