Balancing Triangles: Finding the Centroid is a hands-on geometry activity in which students discover that the centroid of a triangle is its balancing point, or center of mass. Students begin by learning about medians and the centroid, then use the 2:1 ratio to solve practice problems and check their understanding. Next, students cut out a triangle from a sturdy material such as cardstock, cardboard, a cereal box, or poster board. They find the midpoint of each side, draw the three medians, locat