Remarkable points and straight lines in a triangle

Watch this presentation about the remarkable points and straight lines in a triangle, and then watch the tutorials.

You have to see them in this order:

1)Circumcenter

2) Incenter

3) Barycenter

In the three remaining boxes you have to do:

  1. Draw a scalene triangle with free measures and trace its circumcenter.
  2. Draw a right triangle with free measures and trace its incenter
  3. Draw an equilateral triangle with free measures and trace its barycenter.