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To play, click on the desired block with your mouse, or move the cursor with your ARROW KEYS. When the block is highlighted, type your letter. To switch from across to down or vice versa use the ARROW KEYS or Control-CLICK with your mouse. To clear the puzzle, click on your browser's REFRESH or RELOAD button. After clicking "Check Answers", incorrect letters will be marked with an "X". Your teacher has access to the completed puzzle.   Across 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. Down 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.