# A circle has a center at #(7 ,9 )# and passes through #(1 ,3 )#. What is the length of an arc covering #pi /4 # radians on the circle?

##### 1 Answer

Feb 1, 2016

**Circumference** **length of the arc** is

#### Explanation:

The radius is the distance between the center and the point on the circle:

Using the **distance formula** ...

**radius**

**length of the arc is**

hope that helped