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# vocab

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

Acute Angle | with measure between 0* and 90* |

Acute triangle | has 3 acute angles |

Angle | is formed by 2 ray with a common end point called a vertex |

Center of rotation | is a fixed point about which a figure is rotated |

Complementary angles | are an |

Acute Angle | with measure between 0* and 90* |

Acute triangle | has 3 acute angles |

Angle | is formed by 2 ray with a common end point called a vertex |

Center of rotation | is a fixed point about which a figure is rotated |

Complementary angles | are angles that have the same measure |

congruent angles | are angles that have the same measure |

congruent figures | are figures with the same size and shape |

congruent segments | segment that have the same length |

degrees | Angles are measured in units |

Equilateral Triangle | us a triangle with 3 congruent sides. |

Image | is the result of a transformation of a point, line, or figure |

Intersecting Lines | lie in the same plane and have one point in common. |

Irregular Polygon | Is a polygon with sides that are not all congruent and/or angles that are not all congruent. |

Isosceles Triangle | Is a triangle with at least two congruent sides |

Line | Is a series of points that extends in two opposite directions without end |

Line Of Reflection | is a line over which a figure is reflected |

Line Of Symmetry | Divides a figure into mirror images |

Line Symmetry | When one side is the mirror image of the other side |

Obtuse Angle | Is an angle with a measure greater than 90 and less than 180 |

Obtuse Triangle | Is a triangle with one obtuse angle |

Parallel Line | Are lines in the same plane that never intersect |

Parallelogram | Is a quadrilateral with both pair of opposite parallel. |

Perpendicular Line | intersect to from right angles |

Plane | Is a flat surface with no thickness that extends without end in all directions on the surface |

Point | Is a location that has no size |

Polygon | Is a closed figure formed by three or more line segments that do not cross |

Quadrilateral | Is a polygon with four sides |

Ray | Is a part of a line |

Rectangle | is a parallelogram with right angles |

Reflection | Is a transformation that flips a figure over a line of reflection |

Regular Polygon | Is a polygon with all sides congruent and all angles congruent. |

Rhombus | Is a parallelogram with 4 congruent sides |

Right Angle | Is an angle with a measure of 90 |

Right Triangle | Is a triangle with one right angle |

Rotation | Is a transformation that turns a figure about a fixed point called the center of rotation |

Scalene triangle | Is a triangle with no congruent sides |

Segment | Is part of a line |

Similar Figures | if their corresponding angles have the same measure and the lengths of their corresponding sides are proportional |

Skew Lines | Are neither parallel nor intersecting |

Square | Is a parallelogram with 4 right angles and 4 congruent sides |

Straight Angle | Is an angle with a measure of 108 |

Supplementary Angle | 2 angle supplemen |

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