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kow [346]
3 years ago
12

Math homework help wanted

Mathematics
1 answer:
Charra [1.4K]3 years ago
4 0

Answer:

C. 2\pi

Step-by-step explanation:

Central angle ( \theta) = \frac{\pi}{2} = 90\degree

Radius (r) = 4

l(\widehat{EF}) =  \frac{ \theta}{360 \degree}  \times 2\pi \: r \\  \\  =  \frac{90 \degree}{360 \degree}  \times 2\pi(4) \\  \\  =  \frac{1}{4}  \times 2\pi(4) \\  \\  l(\widehat{EF}) = 2\pi

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