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Brilliant_brown [7]
3 years ago
10

A carousel horse travels on a circular path with a radius of 15 ft. How many feet does the horse travel over an angle of 2π3 rad

ians? Round to the nearest foot.
2π3 radians =
Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
4 0

Answer:

The horse travels 31 feet over an angle of \frac{2\pi }{3} radians

Step-by-step explanation:

  • The formula of the length of an arc is L = \frac{x}{360} × 2πr, where x is the central angle subtended by this arc and r is the radius of the circle
  • To change the angle from radian measure to degree measure multiply it by \frac{180}{\pi }

∵ A carousel horse travels on a circular path

- That means the distance that the horse travels is the length

   of an arc of the circular path

∵ The radius of the circular path is 15 feet

∴ r = 15 ft

∵ The horse travel over an angle of \frac{2\pi }{3} radians

- Let us change it to degree by multiply it by \frac{180}{\pi }

∵  \frac{2\pi }{3} × \frac{180}{\pi } = \frac{360}{3} = 120°

- use the formula above to find the distance

∵ d = \frac{x}{360} × 2πr

∵ x = 120°

∴ d = \frac{120}{360} × 2π × 15

∴ d = 10π

∴ d = 31.41592654 feet

- Round it to the nearest foot

∴ d = 31 feet

The horse travels 31 feet over an angle of \frac{2\pi }{3} radians

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