Definition | PG Term |

Two angles that share a common vertex and side. | |

A point that divides, or bisects, a segment into two congruent segments. | |

An equation that states that two ratios are equal. | |

The 'then' part of a conditional statement. | |

The point where three altitudes intersect in a triangle | |

The point where three angle bisectors intersect in a triangle | |

Two angles that are formed by parallel lines and a transversal and lie between the parallel lines and on opposite sides of the transversal. | |

Two polygons such that their corresponding angles are congruent and the lengths of corresponding sides are proportional | |

The point where 3 medians intersect. | |

HL | |

(y2-y1)/(x2-x1) | |

Points that line in the same plane | |

A polygon with three sides | |

Two lines that do not intersect and are coplanar. | |

a dot. | |

The 'if' part of a conditional statement. | |

A triangle with three congruent sides | |

Lines that do not intersect and are NOT coplanar | |

A triangle with three congruent angles. | |

Angles that have the same measure. | |

Points that lie in the same plane. | |

Two angles whose sides form two pairs of opposite rays. The angles form an 'X'. | |

An angle whose measure is between 90 and 180 degrees. | |

The point where three perpendicular bisectors intersect in a triangle. | |

The side opposite the right angle in a right triangle | |

ASA | |

Two angles whose sum is 90 degrees. | |

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