00:03
Okay, with this one, i'm just going to sketch it, so i'll have my circle right here, and then i have this line that's tangent to that, and that's going to be, oh, it's a segment that's tangent.
00:11
That's going to be 10 units long.
00:13
And then we have these two lines that are tangent to it this way, right? and i'm just doing my best here.
00:19
I'm not the best artist, but this here is eight, and this here is four.
00:23
Well, there's a theorem that we prove in geometry that says if we have two tangent lines, and a tangent line is one that just touches the circle at exactly one point.
00:34
Then these are going to be the same length.
00:36
So this side is the same length as that side, and this side is the same length as that side...
