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# Geometry Vocabulary1

### first semester geometry vocabulary

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

the product of multliplying a number by itself | square |

a number that was squared | square root |

a number with a square root symbol | radical |

a triangle with one right angle | right triangle |

each of the sides that form the right angle of a right triangle | leg |

the side opposite the right angle of a right triangle | hypotenuse |

formula for finding the a missing side of a right triangle | a formula for right triangles pythagorean theorem |

a triangle with 3 acute angles | an acute triangle |

a triangle with one obtuse angle | an obtuse triangle |

a triangle with all angles equal | equiangular triangle |

the angle formed by extending one side of a triangle | exterior angle |

an interior angle of a triangle not adjacent to the given exterior angle | remote interior angle |

a triangle with no sides congruent | scalene triangle |

a triangle with two sides congruent | isosceles triangle |

a triangle with all sides congruent | equilateral triangle |

lines that lie in the same plane and do not intersect | parallel lines |

angles on the same side of the transversal; one is interior, one is exterior | corresponding angles |

a line that intersects two different lines at two different points | transversal |

interior angles that are on the same side of the transversal | same-side interior angles |

two lines that intersect to form a right angle | perpendicular lines |

interior angle that are on opposite sides of the transversal | alternate interior angles |

a geometric figure formed by two rays with a common endpoint | angle |

a tool used to measure angles | protractor |

an angle less than 90 degrees | acute angle |

an angle equal to 90 degrees | right angle |

an angle that is greater than 90 degrees | obtuse angle |

an angle that is equal to 180 degrees and forms a straight line | straight angle |

two angles that have a common vertex and a common ray | adjacent angles |

two angles whose measures have a sum of 90 degrees | complimentary angles |

two angles whose measure have a sum of 180 degrees | supplementary angles |

angles that have the same measure | congruent angles |

angles formed by intersecting lines | vertical angles |

a ray that divides and angle into 2 congruent angles | angle bisector |

a statement that is accepted without proof | postulate |

a location space | point |

a geometric figure made up of many points and extends endlessly in both directions | line |

part of a line, it has two endpoints | line segment |

part of a line, it has only one endpoint | ray |

a flat surface that extends endlessly in all directions | plane |

line segments that have the same length | congruent line segments |

the point that divides a line segment into 2 congruent parts | midpoint |

a lines that intersects a line segment at its midpoint | bisector |

points on the same line | collinear points |

a statement that can be proved | theorem |

Created by:
thursh