
2.  The new figure that results from the transformation of a figure in a plane. 
5.  A ray that divides an angle into two adjacent angles that are congruent. 
7.  The middle terms of a proportion. 
11.  The ratio of the vertical change (the rise) to the horizontal change (the run) of a nonvertical line. 
12.  ________ segments are segments that have the same length. 
13.  If an angle of one triangle is congruent to an angle of a second triangle and the lengths of the sides including these angles are proportional, then the triangles are similar. ________ Similarity Theorem. 


1.  The ratio of the lengths of two corresponding sides of two similar polygons. 
3.  The first and last terms of a proportion. 
4.  The operation that maps, or moves, a preimage onto an image. 
6.  A dilation with k > 1. 
8.  An equation that equates two ratios. 
9.  If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar. ________ Similarity Postulate. 
10.  The original figure in the transformation of a figure in a plane. 