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SVETLANKA909090 [29]
3 years ago
15

Consider circle c with angle 3/4 radians. If minor arc AB measures 9n inches, what is the length of

Mathematics
1 answer:
solniwko [45]3 years ago
8 0

The radius of circle is 12 inches

<em><u>Solution:</u></em>

Given that,

Consider circle c with angle \frac{3 \pi }{4} \text{ radians }

Minor arc AB measures 9 \pi inches

Therefore, we can say,

Central\ angle\ in\ radians = \frac{3 \pi }{4}\\\\Arc\ length = 9 \pi

To find: Radius of circle

<em><u>The length of arc when angle given in radians is:</u></em>

s = r \times \theta

Where,

"s" is the arc length and "r" is the radius and \theta is the central angle in radians

9 \pi = r \times \frac{3 \pi }{4}\\\\r = 9 \times \frac{4}{3}\\\\r = 12

Thus the radius of circle is 12 inches

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You need to use Pythagoras’ Theorem. 
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2 years ago
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