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

##### 1 Answer

Feb 3, 2016

#### Explanation:

First thing to do is to find the length of the radius. The line segment joining the center of the circle to <b>any</b> point on the circle constitutes a radius.

Therefore, the line segment joining

Next, you should know that an arc subtending an angle of