click below

click below

Normal Size Small Size show me how

# Module 2 Vocabulary

Term | Definition |
---|---|

Transformation | A change in the position, size, or shape of a figure or graph |

Congruent | Having the same size and shape |

Rotation | a transformation about a point P, such that each point and its image are the same distance from P |

Center Of Rotation | the point about which a figure is rotated |

Symmetry | In the transformation of a figure such that the image coincides with the preimage, the image and preimage have symmetry |

Preimage | the original figure in a transformation |

Image | the new position of a figure after a transformation |

Rigid Motion | A transformation that does not change the size or shape of a figure. |

Translation | a transformation that shifts or slides every point of a figure or graph the same distance in the same direction |

Vector | A quantity that has magnitude and direction |

Initial Point | the starting point of a vector |

Line Symmetry | a figure that can be reflected across a line so that the image coincides with the preimage |

Line Of Symmetry | a line that divides a plane figure into two congruent reflected halves |

Rotational Symmetry | when a figure can be rotated about a point by an angle less than 360 degrees so that the image coincides with the preimage |

Angle Of Rotational Symmetry | the smallest angle through which a figure with rotational symmetry can be rotated to coincide with itself |

Terminal Point | the ending point of a vector |

Angle Of Rotation | An angle formed by a rotating ray, called the terminal side, and a stationary reference ray, called the initial side. |

Reflection | A transformation across a line, called the line of reflection, such that the line of reflection is the perpendicular bisector of each segment joining each point and its image. |

Perpendicular Lines | Lines that intersect to form right angles |

Perpendicular Bisector | a line perpendicular to a segment at the segment's midpoint |