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# Howard Geometry 4

### Chapter 4 Geometry Vocabulary

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

Equiangular | A triangle has three congruent angles. |

Scalene | A triangle has no congruent sides. |

Right | A triangle has one right angle. |

Centroid | The point at which the medians of a triangle intersect. |

Leg (right) | The two sides of a right triangle that make up the right angle. |

Median of a Triangle | A segment from a vertex of a triangle to the midpoint of its opposite side. |

Isosceles Triangle | A triangle has two congruent angles. |

Vertex of a Triangle | A point that joins two sides of a triangle. |

Base | The non-congruent side of an isosceles triangle. |

Hypotenuse | The side on a right triangle opposite of the right angle. |

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

Triangle | A figure formed by three segments joining three non-collinear points. |

Equilateral | A triangle with three congruent sides. |

Acute | A triangle with three acute angles. |

Obtuse | A triangle with one obtuse angle. |

Pythagorean Theorem | The formula used to find a missing side of a right triangle. |

180 degrees | The sum of the measures of the interior angles of a triangle. |

Interior Angle | The triangle on the inside of a polygon. |

Exterior Angle | The angle formed on the outside of a polygon made by extending the side to form a ray. |

Leg (isosceles) | The two sides that are congruent in an isosceles triangle. |

Base Angles | The two congruent angles in an isosceles triangle that are formed between a leg and a base. |

Exterior Angles Theorem | The exterior angle is the sum of the two non-adjacent interior angles. |

Base Angles Theorem | If two sides of a triangle are congruent, then the angles opposite them are congruent. |

Base Angles Converse | If two angles of a triangle are congruent, then the sides opposite them are congruent. |

Equilateral Theorem | Equilateral triangles are equiangular. |

Equiangular Theorem | Equiangular triangles are equilateral. |

Distance Formula | The distance between two points using Pythagorean Theorem. |

Intersections of Medians of a Triangle | The centroid divides the triangle into 1/3 and 2/3 sections. |

Theorem 4.10 | Bigger angles are opposite from bigger sides. |

Theorem 4.11 | Bigger sides are opposite from bigger angles. |

Theorem 4.12 | The sum of the lengths of any two sides of a triangle must be greater than the third. |

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HowardGeometry