A circle has a circumference of 6π feet (ft). An arc, x, in this circle has a central angle of 50∘. Rounded to the nearest tenth of a foot, what is the length of x ?
Q. A circle has a circumference of 6π feet (ft). An arc, x, in this circle has a central angle of 50∘. Rounded to the nearest tenth of a foot, what is the length of x ?
Find Radius using Circumference: Find the radius of the circle using the circumference.The formula for the circumference of a circle is C=2πr, where C is the circumference and r is the radius.Given C=6π, we can solve for r:6π=2πrDivide both sides by 2π to isolate r:r=2π6πr=3
Calculate Length of Arc: Calculate the length of the arc x.The length of an arc (s) in a circle is given by the formula s=r⋅θ, where r is the radius and θ is the central angle in radians.First, convert the central angle from degrees to radians. The conversion factor is π radians =180 degrees.θ=(50 degrees)⋅(180 degreesπ radians)θ=(18050)⋅πθ=(185)⋅π
Use Radius and Central Angle: Use the radius and the central angle in radians to find the length of the arc.s=r⋅θs=3⋅(185⋅π)s=183⋅5⋅πs=1815πSimplify the fraction by dividing both numerator and denominator by 3:s=65π
Convert Length of Arc to Decimal: Convert the exact length of the arc to a decimal and round to the nearest tenth.s \approx \frac{(5 \times 3.14159)}{6}s \approx \frac{15.70795}{6}s \approx 2.61799Rounded to the nearest tenth:s \approx 2.6 feet
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