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The radius of a circle is 9 feet. What is the length of a 180° arc? Give the exact answer in simplest form.​

The radius of a circle is 9 feet. What is the length of a 180° arc? Give the exact answer in simplest form.​
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8 votes
the radius of a circle is 9 feet. What is the length of a 180° arc? Give the exact answer in simplest form.​

User Joshua Kelly
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1 Answer

9 votes
Answer: 9π
Explanation: 180° arc is half of the circle so its length must be half of the circle circumference: (2π(9))/2 = 9π
User WimV
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