Day 128: Formalization of Conclusions

We went through the major ideas to come out of the computer lab investigation from Friday. Having the pre-made applet on hand was very helpful - students who hadn't completed the work could still participate in the discussion just by looking up at the screen. 

Conclusions

1. Radii are congruent (not what I was expecting, but important nonetheless)
2. Distance from point of tangency to point of intersection for two tangents is equal
3. Line connecting center of circle to point of intersection is an angle bisector
4. The angle formed between radius and tangent is a right angle
5. The angle formed by intersecting chords is equal to half the sum of the intercepted arcs

Students then began work on U9 WS2.