# Congruent

If one shape can become another using Turns, Flips and/or Slides, then the shapes are **Congruent**:

Rotation | Turn! | |
---|---|---|

Reflection | Flip! | |

Translation | Slide! |

After any of those transformations (turn, flip or slide), the shape still has the same size, area, angles and line lengths. |

## Examples:

Here are 3 examples of shapes that are **Congruent:**

Congruent(Rotated and Moved) | Congruent(Reflected and Moved) | Congruent(Reflected, Rotated and Moved) |

## Congruent or Similar?

The two shapes need to be the **same size** to be congruent.

When we need to** resize** one shape to make it the same as the other, the shapes are Similar.

When we ... | Then the shapes are ... | |
---|---|---|

... only Rotate, Reflect and/or Translate | ## Congruent | |

... also need to Resize | ## Similar |

** Congruent?** Why such a funny word that basically means "equal"? Maybe because they are only "equal" when placed on top of each other. Anyway it comes from Latin

*congruere*, "to agree". So the shapes "agree".