Supplementary Angles | | A equation that states a rule or a fact. |

Translation | | A parallelogram with four equal sides. |

Complementary Angles | | A triangle with three unequal sides. |

Triangle | | For a three-dimensional figure, the sum of the areas of all the faces. |

Ray | | A squared B squared = C squared |

Scalene Triangle | | The ratio of the circumference of a circle to its diameter. |

X-axis | | The total number of successful events divided by the total number of possible events. |

Obtuse Triangle | | A triangle with an obtuse angle. |

Formula | | Part of a line, with one endpoint, and extending to infinity in one direction. |

Y-axis | | The steepness of a line expressed as a ratio, using any two points on the line. |

Hypotenuse | | The vertical axis in a coordinate system. |

Pi | | A triangle each of whose angles measures less than 90 degrees. |

Pythagorean Theorem | | A triangle that has three equal sides. |

Equilateral Triangle | | Two angles are supplementary if their sum is 180 degrees. |

Isosceles Triangle | | A triangle with at least two equal sides. |

Surface Area | | A letter used to represent a number value in an expression or an equation. |

Line | | A point on a line segment that divides the segment into two congruent segments. |

Midpoint | | A polygon with 4 sides. |

Right Triangle | | A flat surface that stretches into infinity. |

Variable | | A triangle that contains a right angle. |

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

Plane | | The horizontal axis in a coordinate plane. |

Quadrilateral | | A straight set of points that extends into infinity in both directions. |

Acute Triangle | | A transformation, or change in position, resulting from a slide with no turn. |

Slope | | Two angles whose sum is 90 degrees. |

Probability | | A three-sided polygon. |