Definition | PG Term |

An angle whose measure is equal to 90 degrees | |

A triangle with three congruent angles. | |

An angle that measures 180 degrees. | |

CPCTC | |

The point where 3 medians intersect. | |

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

Two lines that intersect to form a right angle. | |

a dot. | |

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

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

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

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

Points that lie in the same plane. | |

A triangle with no congruent sides. | |

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

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

A triangle with one obtuse angle | |

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

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

Points that line in the same plane | |

Lines that do not intersect and are NOT coplanar | |

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

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

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

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 the vertex of a triangle to the midpoint of the opposite side | |

Two adjacent angles who are supplementary | |