00:01
In this question, it says john will run 2 km west.
00:07
So here is where he starts.
00:09
He runs 2 km west, then goes south, so 2 km south.
00:19
Then he goes back to the original starting point.
00:24
So it asks how far did john run.
00:28
So this is a triangle.
00:31
So if this is x, y, and z, so z is going to be x squared plus y squared.
00:43
And therefore, it is 4 plus 4, which you have square root of 8.
00:53
And that's equivalent to 2 .83.
01:00
And the unit is kilometer.
01:03
So the total distance he ran was 2 plus 2 plus 2 .83...