Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Geometry Unit Vocab

### Geometry Unit Vocabulary

TERM | DEFINITION |
---|---|

POINT | An exact location in space |

LINE | A straight arrangement of points that extends forever in opposite directions |

LINE SEGMENT | A part of a line that consists of two endpoints and all the point between |

RAY | A straight arrangement of points that extends forever in one direction |

PLANE | A flat surface that extends forever |

ANGLE | The figure formed when two rays share a common endpoint |

VERTEX | The point where two rays (or line segments) meet |

SIDES OF AN ANGLE | The rays that form an angle |

DEGREE | The unit commonly used to measure the size of an angle |

PROTRACTOR | A geometric tool used to measure an angle |

ACUTE ANGLE | An angle with the measure greater than 0° and less than 90° |

RIGHT ANGLE | An angle with the measure equal to 90° |

OBTUSE ANGLE | An angle with the measure greater than 90° and less than 180° |

STRAIGHT ANGLE | An angle with the measure equal to 180° |

PARALLEL LINES | Two lines in the same plane that do not intersect |

PERPENDICULAR LINES | Two lines that intersect to form right angles |

SKEW LINES | Two lines in different planes that do not intersect |

INTERSECTING LINES | Lines that meet or cross each other at one point |

VERTICAL ANGLES | When two lines intersect, the angles that are not next to each other |

CONGRUENT | Equal in measure |

ADJACENT ANGLES | When two lines intersect, the angles that are next to each other |

COMPLEMENTARY ANGLES | Two angles for which the sum of their measure is 90° |

SUPPLEMENTARY ANGLES | Angles for which the sum of their measure is 180° |

TRANSVERSAL | A line that intersects two parallel lines |

CORRESPONDING ANGLES | Angles that occupy the same relative position |

SCALENE TRIAGLE | A triangle in which no sides are the same length |

ISOSCELES TRIANGLE | A triangle in which two sides are the same length |

EQUILATERAL TRIANGLE | A triangle in which three sides are the same length |

ACUTE TRIANGLE | A triangle in which all angles are acute angles |

RIGHT TRIANGLE | A triangle in which one angle is a right angle |

OBTUSE TRIANGLE | A triangle in which one angle is an obtuse angle |

CIRCLE | A closed, curved shape in which all points on the circle are equal distance from the center |

TRIANGLE | A polygon with three sides |

QUADRILATERAL | A polygon with four sides |

PARALLELOGRAM | A quadrilateral with two pairs of parallel sides |

RECTANGLE | A quadrilateral with two pairs of parallel sides and four right angles |

RHOMBUS | A quadrilateral with two pairs of parallel sides and four sides of equal length |

SQUARE | A quadrilateral with two pairs of parallel sides, four right angles, and four sides of equal length |

TRAPEZOID | A quadrilateral with one pair of parallel sides |

PENTAGON | A polygon with five sides |

HEXAGON | A polygon with six sides |

HEPTAGON | A polygon with seven sides |

OCTAGON | A polygon with eight sides |

NONAGON | A polygon with nine sides |

DECAGON | A polygon with ten sides |

Created by:
Miss Kinman