Across
- 3. constant of proportionality by which all lengths are scaled
- 6. line segment that joins the midpoints of two sides of a triangle
- 7. movement that preserves length and angle measures
- 9. segment in a triangle connecting a vertex to the midpoint of the opposite side
Down
- 1. two lines that lie in the same plane and have no points in common
- 2. two lines that have one point in common and all four angles formed are right angles
- 4. the set of all points of a line that lie between two endpoints
- 5. the set of all points in a plane that are equidistant from the center point
- 8. formed by two rays that share a common vertex and do not lie on the same line