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frez [133]
3 years ago
12

Which is the length of HJ expressed in terms of pi?

Mathematics
1 answer:
Pani-rosa [81]3 years ago
4 0

Answer:

B. 9/20\pi

Step-by-step explanation:

the circumference is 2\pir. Since the radius is one, that would be 2\pi.

81/360=0.225, or 22.5% of the circumference.  22.5% of 2\pi is 0.45\pi.  0.45=9/20, so the answer is B.

CHECK: 2\pi = 6.283

6.283x0.225=0.14137, or 9/20\pi

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