Question

Find the arc length, x, when

,
r= 1 and 8 = 2.5 radians.
Х
2.5
1
x = [?]

Answer 1

x = 2.5

Explanation:

The arc length x is calculated as

x = circumference of circle × fraction of circle

= 2πr ×
`(2.5)/(2\pi )` ( cancel 2π on numerator/ denominator )

x = 1 × 2.5 = 2.5