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ioda
3 years ago
7

Measurements of a Circle (Giving correct answer brainliest)

Mathematics
1 answer:
Fittoniya [83]3 years ago
7 0

Answer:

B. \frac{9}{20}\pi

Step-by-step explanation:

Central angle \theta = 81\degree

Radius (r) = 1 unit

l(\widehat {HJ}) = \frac{\theta}{360\degree} \times 2\pi r

l(\widehat {HJ}) = \frac{81\degree}{360\degree} \times 2\pi r

l(\widehat {HJ}) = \frac{81}{360} \times 2\pi (1)

l(\widehat {HJ}) = \frac{9}{40} \times 2\pi

l(\widehat {HJ}) = \frac{9}{20}\pi

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