| A | B |
|---|
| congruent | having the same shape and size |
| transformation | the movement of a figure by a translation, reflection or rotation |
| translation | moves a figure to a new position along a straight line |
| rotation | the movement of a figure to a new position by turning the figure around a point |
| clockwise | in the same direction in which the hands of a clock move |
| counter clockwise | the opposite directions in which the hands of a clock move |
| reflection | the movement of a figure to a new position by flipping the figure over a line |
| line symmetry | what a figure has if it can be folded on a line so that the two pairs match exactly |
| tessellation | repeating pattern of closed figures that covers a surface with no gaps and no overlaps |
| pattern unit | the part of the pattern that repeats in a tessellation |
