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# Geometric terms

### 5/6 geometry vocabulary

Question | Answer |
---|---|

a closed plane figure made up of line segments | polygon |

a 3 sided polygon | triangle |

a 5 sided polygon | pentagon |

a 6 sided polygon | hexagon |

a 4 sided polygon | quadrilateral |

a a polygon that has equal sides and angles | a regular polygon |

an angle that measures between 0* and 90* | acute angle |

an angle that measures exactly 90* | right angle |

an angle that measures between 90* and 180* | obtuse angle |

an angle that measures exactly 180* | a straight angle |

the central point on a circle which is the same distance from the center | circle name or center |

a line from the center point of a circle to any point on the circle. It is 1/2 of the diameter. | radius |

a line that has end points on a circle | chord |

a line segment that passes through the center of a circle cutting the circle in 1/2. | diameter |

an angle whose vertex is the center of a circle | central angle |

a quadrilateral with both pairs of opposite sides parallel and equal in length | parallelogram |

a parallelogram with 4 right angles | rectangle |

a parallelogram with all sides the same length | rhombus |

a rectangle with all sides the same length | square |

a quadrilateral with only one pair of parallel sides | trapezoid |

a triangle with all angles less than 90* | acute triangle |

a triangle with one right angle | right triangle |

a triangle with one obtuse angle | obtuse triangle |

a triangle with all side of equal length | equilateral triangle |

a triangle with 2 sides the same length | isosceles triangle |

a triangle with no sides the same length | scalene triangle |

The sum of the measures of the angles of a quadrilateral is... | 360* |

the sum of the measures of the angles of a triangle is .... | 180* |

an exact location in space | point |

a straight path of points that goes on forever in 2 directions | line |

part of a line. It has 2 endpoints | line segment |

a part of a line. It has one endpoint and extxnds forever in only one direction. | ray |

an endless flat surface. | plane |

2 lines that never cross and stay the same distance apart | parallel lines |

2 lines that pass through the same point | intersecting lines |

2 rays with the same endpoint | angle |

the common endpoint of an angle | vertex |

A tool used to measure angles | protractor |

an angle that measures between 0* and 90* | acute angle |

an angle that measures exactly 90* | right angle |

an angle that measures between 90* and 180* | obtuse |

the point where 2 rays meet | vertex |

Created by:
lleahy