We discussed this lesson today as a class:
If you were absent, you can review a filled-in version of the lesson here:
Here is a 5-minute video showing how to build the circumcentre using Geogebra Classic:
Opportunity to Learn
To further prepare for tomorrow’s unit test, and practice key skills for that evaluation, algebraically verify the other two triangle centres that you did not complete today in class.
For example, in the filled in version of today’s lesson, the co-ordinates of the centroid were verified using algebra. Verifying the co-ordinates of the circumcentre and the orthocentre would be great additional practice.