shapes of triangles

For two shapes to be similar, they have to be the same shape, but they do not have to be the same size. Drag the vertices of triangle DEF so that it is similar to triangle ABC, but not also the same size. Study the diagrams and make a few observations about the relationships between elements of the triangles. Share them with your group. Come to a consensus about your observations. What constitutes similarity? In order for a set of triangles to be similar, what relationships must be withheld amongst them?