00:01
Well, this problem we want to find the equation in a circle whose end points of a diameter are given here.
00:07
Now, you need to know two things if you're going to find the equation of a circle.
00:10
You need to find the center and the radius.
00:14
Now, the center is just the midpoint of the end points of the diameter.
00:19
And so we're going to take negative 7 plus negative 15 divided by 2, negative 2 plus 6, and divided by 2.
00:31
Just finding the midpoint of these two points.
00:35
Naive 7 plus negative 15 is negative 22, divided by 2 is negative 2.
00:40
Negative of 11.
00:43
Negative 2 plus 6 is 4 divided by 2 is 2.
00:49
And so our center is going to be the point of 11 2.
00:54
Now find your radius.
00:56
Your radius is the distance from the center to a point on the circle...