A sector of a circle has a radius of 140m and a central angle of 80 degrees. Calculate the arc length.

The figure represents a sector of a circle. A sector is defined by two radii and the arc connecting their endpoints.
From the diagram:

• The length of one radius ($r$) is 140 m. Since both straight sides of a sector are radii, the other straight side is also 140 m.
• The angle between the two radii (the central angle, $\theta$) is $80^\circ$.

The formula for the arc length $L$ of a sector is $L = r\theta$, where $\theta$ must be in radians.
First, convert the central angle from