Definition | PG Term |

A triangle with at least 2 congruent sides and angles. | |

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

a segment drawn from a vertex perpendicular to the opposite side | |

a dot. | |

a ray that divides an angle into two angles that are congruent. | |

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

two angles that are formed by parallel lines and a transversal and occupy corresponding positions | |

The point where three altitudes intersect in a triangle | |

Angles that have the same measure. | |

y-y1=m(x-x1) | |

A polygon with three sides | |

The side of a right triangle that is opposite the right angle. | |

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

A triangle with three congruent sides | |

Two angles formed by two parallel lines and a transversal that lie on the interior of the parallel lines and on the same side of the transversal. | |

An angle that measures 180 degrees. | |

A segment drawn from the vertex of a triangle to the midpoint of the opposite side | |

An angle whose measurement is between 0 and 90. | |

A triangle with no congruent sides. | |

The point where 3 medians intersect. | |

ASA | |

SSS | |

A triangle with one obtuse angle | |

An angle whose measure is equal to 90 degrees | |

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

AAS | |

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