Students will see a proof of the circumcenter theorem, which says that the perpendicular bisectors of a triangle intersect at a unique point that is equidistant from the vertices of the triangle. Their point of intersection, is of course, the circumcenter. Watch the second part of this video for a proof.
Conclude by giving your students these challenges:
- 2019 Math Kangaroo Levels 7-8 Problem #25 Solution #2 by STEM4all
- Back to the Planet of Vuvv by NRICH
- Euromaths by NRICH
- Ones Only by NRICH
- Painted Faces by Pierce School: Problem / Solution