Teaching Geometry - Chapter 3: Triangles
In the previous section, we looked at the case where three lines crossed at two points. In this section, we're going to change that a little and let them cross at three - forming a triangle.
The material in this classroom is substantially identical to Teaching Geometry. The only significant difference is that this online version doesn't contain the complete solutions to the source text's exercises that the printed version has. This was a conscious decision on our part since we felt that some parents might not want the solutions being available to their students. We've also added a brief introduction to each Chapter in the online version that we think helps to set up the context which isn't necessary when the physical textbook is being used as a companion to the student's text.