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# Medlen U2-3 Vocab

### Vocab Terms

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

Law of Detachment | If a conditional is true and its hypothesis is true, then its conclusion is true. |

Conditional | Another name for an if – then statement |

Supplementary | Two angles whose measures have a sum of 180 |

Converse | A conditional switches the hypothesis and the conclusion |

Hypothesis | The part of a conditional following if |

Negation | A statement that has the opposite truth value |

Complementary | Two angles whose measures have a sum of 90 |

Deductive Reasoning | The process of reasoning logically from given statements to a conclusion |

Adjacent | Two angles that share a common side. |

Formal Proof | A proof that contains statements and reasons organized into two columns is a |

Venn Diagram | A diagram that uses circles to illustrate conditionals |

Inverse | Negates both the hypothesis and conclusion of a conditional statement |

Law of Syllogism | Allows you to state a conclusion from two true conditional statements when the conclusion of one statement is the hypothesis of the other statement. |

Conclusion | The part of a conditional following then |

Vertical Angles | Two angles formed by intersecting lines |

Counterexample | An example or instance of the statement that makes the statement false. |

Equivalent Statements | Statements with the same truth value |

Truth Value | A conditional is either true or false |

Contrapositive | Switches and negates both the hypothesis and conclusion of a conditional statement. |

Inductive Reasoning | Reasoning based on patterns you observe. |

Algebraic Proof | A proof that is made up of a series of algebraic statements |

Transversal | A line that intersects two coplanar lines at two distinct points. |

Isosceles Triangle | A triangle that has at least two sides congruent. |

Scalene Triangle | A triangle that has no sides congruent. |

Alternate Interior Angles | Non-adjacent interior angles that lie on opposite sides of a transversal. |

Same Side Interior Angles | Angles that lie on the same side of a transversal and between two lines. |

Corresponding Angles | Angles that lie on the same side of a transversal in corresponding positions. |

Equiangular Triangle | A triangle that has all angles congruent. |

Alternate Exterior Angles | Non-adjacent exterior angles that lie on opposite sides of a transversal. |

Acute Triangle | A triangle that has all acute angles. |

Point Slope Form | What form is the following equation? y-y1=m(x-x1) |

Exterior Angle | An angle formed by a side and an extension of an adjacent side. |

Polygon | A closed plane figure with at least three sides that are segments. |

Convex Polygon | A polygon that has no diagonal with points outside the polygon. |

Slope Intercept Form | What form is the following equation? y=mx+b |

Concave Polygon | A polygon with at least one diagonal with points outside the polygon |

Equilateral | A polygon with all sides congruent. |

Right Triangle | A triangle that has one right angle. |

Obtuse Triangle | A triangle that has one obtuse angle. |

Equilateral Triangle | A triangle that has all sides congruent. |

Equangular Polygon | A polygon with all congruent angles. |

Regular Polygon | A polygon with both congruent angles and congruent sides. |

Standard Form | What form is the following equation? Ax+By=C |

Remote Interior Angles | For each exterior angle there are two nonadjacent interior angles called these. |