Answer:
![arc\ length=3](https://img.qammunity.org/2020/formulas/mathematics/high-school/8ynyhprm9y05lfts07rf2ce23zti7r3lvm.png)
Explanation:
The formula for calculate the arc lenght is:
![arc\ length=2\pi r((\theta)/(360))](https://img.qammunity.org/2020/formulas/mathematics/high-school/8izffojjhiwzpjl9wu4r0s4qtpw8uo9ihp.png)
Where "r" is the radius and "
" is the central angle of the arc in degrees.
The formula used to find the circumference of a circle is:
![C=2\pi r](https://img.qammunity.org/2020/formulas/mathematics/middle-school/kmguleyi3d7rsbh4zj0jg7p7fumid62phf.png)
Where "r" is the radius.
Then, we can observe that the formula for calculate the arc lenght can be rewritten in this form:
![arc\ length=C((\theta)/(360))](https://img.qammunity.org/2020/formulas/mathematics/high-school/sqbxo9h5xrkezw6oievbyedhr7edy0hch2.png)
Where "C" is the circumference of the circle.
Finally we need to substitute the central angle and the circumference into
. Then the result is this:
![arc\ length=36((30\°)/(360))=3](https://img.qammunity.org/2020/formulas/mathematics/high-school/4z4k39y564l8d198xjwmjanp1i8pcjbdzm.png)