High School

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A circle has a radius of 10 inches. Find the approximate length of the arc intersected by a central angle [tex]\frac{2 \pi}{3}[/tex].

A. 6.67 inches
B. 10.47 inches
C. 20.94 inches
D. 62.8 inches

Answer :

To solve the problem, we need to find the length of the arc intercepted by a central angle in a circle. The formula for the arc length is:

[tex]$$
s = r \theta
$$[/tex]

where
- [tex]$s$[/tex] is the arc length,
- [tex]$r$[/tex] is the radius of the circle, and
- [tex]$\theta$[/tex] is the central angle in radians.

Given that the radius is [tex]$r = 10$[/tex] inches and the central angle is

[tex]$$
\theta = \frac{2\pi}{3},
$$[/tex]

we substitute these values into the formula:

[tex]$$
s = 10 \times \frac{2\pi}{3}.
$$[/tex]

Multiplying, we have:

[tex]$$
s = \frac{20\pi}{3}.
$$[/tex]

Now, approximating the numerical value of [tex]$\frac{20\pi}{3}$[/tex]:

[tex]$$
s \approx 20.94 \text{ inches}.
$$[/tex]

Thus, the approximate length of the arc is [tex]$\boxed{20.94 \text{ inches}}$[/tex].

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Rewritten by : Jeany