Unit 7 Similarity

4. a line that crosses at least 2 other lines
8. the ratio of side lengths in the image to the corresponding side lengths in the preimage
11. If a segment joins the midpoints of two sides of a triangle, then the segment is parallel to the third side and is half as long.
12. the number x such that a/x = x/b
14. If a line is parallel to one side of a triangle and intersects the other two sides, then it divides those sides proportionally.

1. If the corresponding sides of two triangles are proportional, then the triangles are similar.
2. If an angle of one triangle is congruent to an angle of a second triangle, and the sides that include the two angles are proportional, then the triangles are similar.
3. the longest side of a right-angled triangle, the side opposite the right angle
5. produces an image that is a different size than the preimage
6. a rigid motion, a dilation, or a composition of both
7. a perpendicular segment from the vertex of a triangle to the line containing the side opposite the vertex
9. If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.
10. to divide into 2 equal parts
13. a transformation that preserves length and angle measure