This document discusses similarity between figures. It provides examples of dilating and transforming triangles to prove they are similar. Specifically, it shows dilating one triangle from its center by a scale factor of 2, then translating it 20 units left and 2 units down to map it onto another triangle. This proves the triangles are similar. A second example dilates a triangle from its center by a scale factor of 1/3, reflects it across an axis, then translates it 2 units right to map it onto another triangle, again proving similarity. The document emphasizes using precise language to describe the dilation and rigid motion sequences.