Across Down 2. an exact position or location on a plane surface. 1. motion A transformation that change the position 4. The original figure before transformation. of a figure without changing it's shape or size. 5. Points that lie on the same line. 3. A rigid motion that slides a figure to a new 6. Part of a line with one endpoint and an arrow that location. extends in one direction. 5. A round plane figure whose boundary consists of 7. The transformed figure after transformation. points equidistant from a fixed point call the center. 8. motion A transformation that change the position of a figure without changing it's shape or size. 6. A rigid motion the flips a figure over a line called the line of reflection. 9. Part of a line with two endpoints 8. A rigid motion that turns a figure about a point 10. Points that lie in the same plane. called the center of rotation. 12. a straight figure which extends in both directions 11. Two rays which intersects at a common endpoint. that never ends