Question

In a circle with an 8-inch radius, a central angle has a measure of 60°. How long is the segment joining the endpoints of the arc cut off by the angle?

Answer 1

calculate circumference first:

C = 2πr
C = 2(3.14159)(8 inches)
C = 50.265 inches 

 then 60/360 = 1/6 of the circle 

  50.265 inches / 6
= 8.378 inches (Round answer as needed) 

Answer 2

Answer:

The length of segment joining the endpoints of the arc is $8\ in$

Step-by-step explanation:

we know that

In the triangle ABC

see the attached figure to better understand the problem

$AC=BC$ -----> is the radius of the circle  

$m<CAB=m<CBA$

$m<ACB=60\°$ ----> given problem (central angle)

Initially the triangle ABC is an isosceles triangle

Remember that

the sum of the internal angles of triangle must be equal to $180\°$

For this particular case, the isosceles triangle ABC becomes an equilateral triangle, as the three angles are equal to $60\°$

The equilateral triangle has three equal sides and tree equal angles

so

$AC=BC=AB$

Hence

The length of segment joining the endpoints of the arc is $8\ in$