| A | B |
|---|
| translation | every point in the image is at the same distance in the same direction, also called a slide |
| preimage | original image before the transformation is applies |
| congruent | same shape and size |
| transformation | a change |
| perpendicular | rays, line segments or lines that intersect at right angles |
| midpoint | the point of a line segment that is equal from its endpoints |
| bisector | line, ray or line segment that intersects a line segment at its midpoint |
| reflection | replacement of each point on one side of a line by the point symmetrically placed on the other side of the line. |
| symmetry | figure is unchanged although its position may be altered |
| rotation | a turning around as on fixed point |
| tessellation | congruent copies of afigure that do not overlap |
| linear pair | two angles that share a comon side and whose noncommon sides are opposite rays |
| transversal | line that intersects at least two other lines |
| exterior | outside |
| interior | inside |
| consecutive | common endpoint |
