00:01
So i want to name a couple of pairs of opposite rays.
00:04
What are opposite rays? well, by definition, they have the same endpoint but different, but other ends are going in different directions.
00:16
So anything that has the same endpoint, but its other ends are going in different directions.
00:20
And i see in this parallelogram that i know that with a common endpoint of e, i can create two rays, a -e and d -e, or, excuse me, e -a and e -d, they both start at e, but they go in different directions into a and d.
00:44
Or i can name a pair of rays such that the endpoint is f, right? and f has many different directions.
00:51
I could go f -e for that ray.
00:54
I can go f -d, f -a, f -c, doesn't matter...