skyhawks1423 skyhawks1423

22-03-2020
Mathematics

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In a circle, an arc has an arc length of 4π. If the arc measure is 80°, what is the length of the radius of the circle?

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PollyP52 PollyP52

22-03-2020

Answer:

9 units.

Step-by-step explanation:

Arc length = r C where r = radius and C is the arc measure in radians.

Arc measure = 80 * π/180 radians. So:

4π = r * 80π/180

4 = 80r / 180

80r = 4 * 180

r = 720 /80

r = 9.

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