00:01
We're given the endpoints of the diameter.
00:02
We need to find the center and the radius.
00:04
So our center, we find by doing the midpoint, which is x1 plus x2 divided by 2, y1 plus y2 divided by 2.
00:14
So this is x1, y1, x2, y2.
00:17
So we have negative 5 plus 2 divided by 2 and 3 plus negative 1 divided by 2.
00:24
So this becomes negative 3 halves, and this becomes 2 over 2, which is 1.
00:28
So that is our center.
00:30
So now to find our radius, we're going to find the distance between the center and one of the given points.
00:37
So x2 minus x1 squared plus y2 minus y1 squared.
00:43
So our distance is the square root.
00:46
We're going to label this x1, y1...