Definition | PG Term |

HL | |

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. | |

A segment that is drawn from the center of a circle to the circle. | |

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

Two angles whose sum is 90 degrees. | |

An angle whose measure is equal to 90 degrees | |

CPCTC | |

Points that lie on the same line. | |

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

A triangle with three congruent angles. | |

Angles that have the same measure. | |

SSS | |

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

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

A triangle with one obtuse angle | |

A segment that connects the midpoints of a triangle or trapezoid. | |

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

Points that lie in the same plane. | |

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

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

An angle that measures 180 degrees. | |

A line drawn perpendicular to a side through its midpoint. | |

ASA | |

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

Two adjacent angles who are supplementary | |

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