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# HOLDENMATH-GEO

### HOLDENMATH-GEO STACK #1

Terms | Definitions |
---|---|

Acute Angle | is less than 90 degress |

Adjacent Angles | Two angles that have a common side and a common vertex |

Angle | A figure that consists of two noncollinear rays with a common endpoint. |

Angle Bisector | A ray that divides an angle into two congruent angles |

Collinear Points | Points that lie on the same line. |

Complementary angles | Two angles whose sum of their measures is 90 degrees. |

Congruent Angles | Two angles that have the same measurement. |

Coordinate | In an ordered pair, the first component is called the x-coordinate and the second component is called the y-coordinate. |

Coordinate Plane | is a number plane formed by two perpendicular number lines that intersect at their zero points. |

Coplanar Points | Points that lie in the same plane. |

Degree | is one of the units of meaures used in measuring angles. |

Distance | The absolute value of the difference of the coordinate of two points on a number line represents the measure of the distance between two points. |

Exterior | Any point that is not on the angle or in the interior of the angle. |

Intersection | the set of points that are in both figures. |

Line | One of the basic undefined terms of geometry. They extend indefintely and have no thickness or width. |

Linear Pair | Two angles that are adjacent and their noncommon sides are opposite rays. |

Midpoint | A point between two points forming segments that are of equal measure. |

Obtuse Angle | An angle that is greater than 90 degrees. |

Ordered Pair | a pair of numbers which the order is specified. They are used to locate points in a plane. |

Origin | The point of intersection of the x-axis and y-axis in a coordinate plane and named O. |

Perpendicular Lines | Two lines that intersect to form a right angle. |

Plane | One of the basic undefined terms of geometry. They extend indefinetly in all directions and have no thickness. |

Point | One of the basic undefined terms of geometry. They have no dimension and are represented by dots, and are named by capital letters. |

Postulate | A statement that describes a fundamental property of the basic terms. They are accepted as being true. |

Protractor | A tool used to find the degree meaure of a given angle. |

Compass | An instrument used to draw circles and arcs of circles. |

Quadrant | One of the four regions into which two perpendicular number lines separate the plane into. |

Ray | A set of points that starts with an endpoint and goes on indefinitely in the other direction. |

Right Angle | An angle whose degree measure is 90. |

Segment | Part of line that consists of two points called endpoiints, and all the point between them. |

Side | The two rays that form the angle. |

Space | The set of all points. |

Straight Angle | An angle whose degree measure is 180. |

Supplementary Angles | Two angles whose sum of their degree measures is 180. |

Theorem | A theorem is a statement that must be proven before it is accepted as true |

Undefined Term | A word that has a measing that is readily understood. The basic ones in geometry are point, line and plane. |

Vertex | The common endpoint of the two rays that form the angle. |

Vertical Angles | Two angles that are two nonadjacent angles formed by intersecting lines. |

X-Axis | The horizontal number line in a coordinate plane. |

X-coordinate | The first component in an ordered pair. |

Y-axis | The vertical number line in a coordinate plane. |

Y-coordinate | The second component in an ordered pair. |

Corollory | A statement that can be easily proven using a theorem. |

Created by:
holdenmath