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# GEOMETRY A1

### VOCAB.

Question | Answer |
---|---|

angle | the intersection of nonlinear rays at a a common endpoint. |

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

collinear | points that lie on the same plane. |

angle | the intersection of nonlinear rays at a a common endpoint. |

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

collinear | points that lie on the same plane. |

congruent | having the same measure. |

coplanar | points that lie on the same plane. |

midpoint | the point on a segment exactly halfway betweeen the endpoint of the segments. |

perimeter | the sum of the lengths of the sides on a polygon. |

perpendicular | lines,segements,or rays that form right angles. |

polygon | a closed figure formed by a finite number of coplanar segments callde side |

segment bisectors | a segment, line or plane that inersects a segment at its midpoint |

vertex | the common endpoint |

volume | a measure of the amount of space enclosed by a three dimensional figure. |

adjacent | common vertex and side with no common interior points (nothing overlaps) |

linear pair | adjacent angles that are formed by opposite rays. |

vertical angles | two nonadjacent angles formed by tow lines (always form a "X") |

vertical angles | two nonadjacent angles formed by tow lines (always form a "X") |

complementary angles | two angle whose sum equal 90 |

complementary angles | two angle whose sum equal 90 |

supplementary angles | two angle whose sum equal 180 (any linear pair=180) |

supplementary angles | two angle whose sum equal 180 (any linear pair=180) |

perpendicular linea | form 90 angles |

perpendicular linea | form 90 angles |

inductive reasoning | use number of specific example to arvie at a conclusion. |

conjecture | a concluding statement. |

counter example | an example that proves a statement is false . |

commpound statement | joined by "AND.OR" |

conjunction statement | joined by "AND" |

disconjunction statement | joined by "OR" |

negation | not "P" is the negation of the statement "P". |

conditional statement | a statment that can be written in "IF-THEN FORM". |

hypothesis | the phrase of a conditional statement that immediatley follows the word "IF". |

conclusion | the phrase of a conditional statement that immmediatley follows the word "THEN". |

converse | formed by exchanging hypothesis and conclusion. |

inverse | formed by negating both the hypothesis and the conclusion. |

contrapositive | formed by negating both parts of the converse. |

PARALLEL LINES | NEVER INTERSECT (CROSS) IN THE SAME PLANE (COPLANAR). |

TRANSVERSAL | A LINE THAT GOES THROUGH TWO OR MORE LINES AT TWO DIFFERENT POINTS. |

SKEW LINES | DO NOT INTERSECT AND ARE NOT COPLANAR (NOT ON THE SAME PLANE) |

PARALLEL PLANES | PLANE THAT DO NOT INTERSECT.(CROSS) |

VERTICAL ANGLES ARE ALWAYS WHAT...? | EQUAL |

ALTERNATE EXTERIOR ANGLES | NON ADJACENT INTERIOR ANGLES THAT LIE ON THE OPPOSITE SIDE OF THE TRANSVERSAL. |

ALTERNATE EXTERIOR ANGLES | NONADJACENT EXTERIOR ANGLES THAT LIE ON THE OPPOSITE SIDE OF THE TRANSVERSAL. |

CONSECTIVE INTERIOR ANGLES | INTERIOR ANGLE ON THE SAME SIDE OF THE TRANSVERSAL. |

CORRESPONDING ANGLES | LIE ON THE SAME SIDE OF THE TRANSVERSAL ON THE SAME SIDE OF THE LINES. |

VERTICAL LINE SLOPE IS ALWAYS...? | UNDEFINEED |

HORIZONTAL LINE SLOPE IS ALWAYS...? | ZERO (0) |

SLOPE OF PARALLEL LINES | VERTICAL LINES ARE PARALLEL & NON VERTICAL LINES HAVE THE SMAE SLOPE. |

SLOPE OF PERPENDICULAR LINES | 2 NON VERTICAL LINES ARE PERPENDICULAR ONLY IF THE PRODUCT OF THEIR SLOPE IS -1. |

Created by:
ladyviking