Question

Measurements of a Circle (Giving correct answer brainliest)

Answer 1

Answer:

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

Step-by-step explanation:

Central angle $\theta = 81\degree$

Radius (r) = 1 unit

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

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

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

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

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