$\"\"$

Arc length of the circle : $\"\"$ .

Here, radius $\"\"$ inches and arc length $\"\"$ inches.

Substitute the values $\"\"$ inches and $\"\"$ inches in $\"\"$ .

$\"\"$

Divide each side by 4.

$\"\"$

$\"\"$ radians.

$\"\"$

The central angle is $\"\"$ radians.