Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Pre-Algebra Ch. 9

Term | Definition |
---|---|

acute angle | an angle with a measure greater that 0 degrees and less than 90 |

acute triangle | a triangle that has three angles less that 90 degrees |

congruent | line segments that have the same length, or angles that have the same measure, or figures that have the same size and shape |

converse | the statement formed by reversing the phrases if and then in an if-then statement |

Distance Formula | the distance between two points with coordinates (x1, y) and (x2, y2) |

Equilateral Triangle | a triangle with all sides congruent |

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

irrational numbers | a number that cannot be expressed as a/b where a and be are integers and b does not equal zero (these numbers just don't make sense) |

isosceles triangle | a triangle that has at least two congruent sides |

legs | the sides that are adjacent to the right angle of a right triangle |

line segment | part of a line containing two endpoints and all the endpoints between them |

obtuse triangle | a triangle with one obtuse angle |

obtuse triangle | a triangle with one angle greater than 90 degrees |

perfect square | rational numbers whose square roots are whole numbers |

Pythagorean Theorem | the sides of a right triangle represented by a,b, and c, when a^2 + b^2 = c^2 |

radical sign | the symbol used to indicate a nonnegative square root |

real numbers | the set of rational numbers together with the set of irrational numbers |

scalene triangle | a triangle with no congruent sides |

similar figure | figures that have the same shape but not necessarily the same size |

solve a right triangle | using the Pythagorean Theorem to find the length of the third side of a triangle, if the lengths of the other two sides are known |

square root | one of the two equal factors of a number |

straight angle | an angle with a measure equal to 180 degrees |

triangle | a figure having three sides |

vertex | the common endpoint of the rays forming an angle |

Created by:
Miss Brinkoetter