00:01
There are two ways to solve this problem.
00:02
One is using graphing paper, graph a very perfect circumference, and make sure everything is up to scale, and you can find all the points that lie on the line of the circumference or not.
00:15
The other option, which is what we're going to do, is using the distance formula.
00:19
Let's start with the first coordinate of negative 6 on the x and 6 on the y.
00:26
For the distance formula, we need the difference on the x.
00:29
So minus 6, minus 4.
00:32
Minus 6, minus 4 squared, plus the difference on the y's, which is minus 6 and minus 6.
00:41
Sorry, 6 minus 6 squared.
00:45
This is equal to the square root of minus 6, minus 4 is minus 10.
00:49
Square is 100.
00:51
And 6 minus 6 is 0.
00:53
So this is just a square of 100.
00:55
This is equal to 10.
00:57
Since the distance between the two points is simply.
01:00
Equal to the radius, then point a lies on the circumference.
01:05
Let's go for the second point, which is negative 4 and 12.
01:14
We have to do the distance formula.
01:17
Again, the difference on the x, we have negative 4 on the x and 4...