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What is the measure of arc AC? How did you get this answer?

What is the measure of arc AC? How did you get this answer?
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What is the measure of arc AC? How did you get this answer?

What is the measure of arc AC? How did you get this answer?-example-1
User MountainX
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1 Answer

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the double of an inscribed angle is equal to the central angle and central angle is equal to arc angle, therefore:
2(3x-1.5)=(3x+9)
6x-3=3x+9
6x=3x+12
3x=12
x=4
then plug it back to the first equation 3x+9, so, therefore 3(4)+9=21
User Darkhydro
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8.1k points
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