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Arc BC on circle A has a length of [tex]\frac{115}{6} \pi[/tex] inches. What is the radius of the circle?

The radius of the circle is [tex]$\square$[/tex] inches.



Answer :

To find the radius of the circle, we start with the formula for the arc length of a circle, which is given by:

[tex]\[ \text{Arc Length} = r \times \theta \][/tex]

where [tex]\( r \)[/tex] is the radius of the circle, and [tex]\( \theta \)[/tex] is the central angle in radians corresponding to the arc.

Given the arc length [tex]\( \frac{115}{6} \pi \)[/tex], we need to solve for the radius [tex]\( r \)[/tex].

The problem implies that the arc length corresponds to the entire circumference of the circle, which means the central angle [tex]\( \theta \)[/tex] is [tex]\( 2\pi \)[/tex] (a complete circle).

Substitute the arc length and [tex]\( \theta \)[/tex] into the formula:

[tex]\[ \frac{115}{6} \pi = r \times 2\pi \][/tex]

To isolate [tex]\( r \)[/tex], divide both sides of the equation by [tex]\( 2\pi \)[/tex]:

[tex]\[ r = \frac{\frac{115}{6} \pi}{2\pi} \][/tex]

Simplify the fraction:

[tex]\[ r = \frac{\frac{115}{6}}{2} \][/tex]

[tex]\[ r = \frac{115}{12} \][/tex]

Convert this fraction to a decimal for better understanding:

[tex]\[ r \approx 9.5833 \][/tex]

Therefore, the radius of the circle is [tex]\(\boxed{9.5833}\)[/tex] inches.