High schoolers investigate properties of the four centers of a triangle and explore a special property of the circumcenter and orthocenter of a triangle. This instructional activity requires the use of Cabri, Jr.

For this centroid of triangles learning exercise, students use given information to determine the centroid of a triangle. They identify the point through which all medians of the triangle pass. This five-page learning exercise contains...

Students model and solve a real-world problem by constructing the centroid of a triangle. They explore relationships of the medians of a triangle and investigate how the centroid partitions each of the medians. Students investigate...