What is the arc length of arc CD in the circle below?
Circle A is shown with a radius labeled 6 feet and a central angle marked 30 degrees.

A.) 3.14 feet
B.) 4.88 feet
C.) 6.98 feet
D.) 11.78 feet

Respuesta :

The length of the arc intercepted by a central angle is the ratio of the angle to 360 degrees times the circumference. From the given values above,
                            S = (30° / 360°) x 2 x π x (6 ft)
                                 S = π
The angle intercepted an arc which measures π feet. The answer is letter A. 

The length of the arc is expressed as 3.14fet

Length of an arc

The formula for calculating the length of an arc is expressed as:

  • L = rФ

Given the following parameter

  • r = 6ft
  • Ф = 30 = π/6

Substitute into the formula to have:

L = π/6(6)

L = 3.14 ft

Hence the length of the arc is expressed as 3.14fet

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