00:01
All right, so here we're asked to define the difference between writing x, y, right, considering that x and y are points, we need to find the difference between x, y, with a line on top, and this other notation, just x, y, with nothing on top.
00:15
So if we have two points, one x and another point y, and we have a line, or let's just say a segment here in between them, or defined by them, in fact, if we write x, y with the line on top, we're referring to the segment as a whole.
00:31
Whole.
00:32
And if we write xy without the line on top, we're actually talking about the length of the segment...