00:03
Chapter 6, section 3, problem 1, name the four types of points of concurrency, which lines intersect to form each of these points.
00:16
All right, so your first point of concurrency is called a circumcenter, and it is formed by the three perpendicular bisectors.
00:40
Now, in my picture, i only have two drawn in.
00:43
You really only need two drawn in to see it.
00:45
And so here is a visual of a circumcenter.
00:48
This is a rough drawing.
00:48
I did not do any of these to scales.
00:51
So notice the tick mark here saying that this has been bisected, so it is a perpendicular bisector.
00:56
Tick marks here showing this side has been bisected is a perpendicular bisector and the circumcensor would be right there.
01:05
Your second point of concurrency is an end center, and that is formed from the four angle, i'm sorry, the three angle bisectors.
01:24
Here is a visual of that for you.
01:26
Oops...