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

# Geometry Chapter 1

### Mcdougal Littell Vocab.

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

An unproven statement that is based on observations. | Conjecture |

A process that includes looking for patterns and making conjectures. | Inductive reasoning |

An example that shows a conjecture is false. | counterexample |

A point has no dimension. It is usually represented by a small dot. | point |

A line extends in one dimension. It is usually represented by a straight line with two arrowheads to indicate that the line extends without end in two directions. | line |

extends in two dimensions. It is usually represented by a shape that looks like a tabletop or wall. You must imagine that the plave extends without end, even though the drawing of a plane appears to have edges. | plane |

Points that lie on the same line. | collinear points |

Points that lie on the same plane. | coplanar points |

All points on the line that are between the endpoints. | line segment |

Part of a line that consists of two points. | endpoints |

All points on the line that extend in one direction. | ray |

Part of a line that consist of a point | initial point of a ray |

One ray is pointing in one direction and another ray is pointing the opposite direction. | opposite rays |

To have one or more points in common. | intersect |

The set of points that two or more geometric figures have in common. | intersection |

Rules that are accepted without proof. | postulates |

Rules that are accepted without proof. | axioms |

The real number that corresponds to a point on a line. | coordinate |

The absolute value of the difference between the coordinates of the points. | distance beteen two points on line |

The distance between the endpoints of a segment. | length of a segment |

When three points lie on a line, you can say that one of them is between the other two. | between |

distance between A and B in a coordinate plane | distance formula |

Segments that have the some length. | congruent segments |

Consists of two different rays that have the same initial point. The rays are the sides of the angle, and the initial point is the vertex of the angle. | angle |

Rays of an triangle. | sides |

Initial point of the angle. | vertex of an angle |

Angles that have the same measure. | congruent angles |

All points between the points that lie on each side of the angle. | interior of an angle |

When the sides of a triangle are extended, the angles that are adjacent to the interior angles. | exterior of an angle |

An angle with a measure between 0 degrees and 90 degrees. | acute angle |

An angle with measure between 90 degrees and 180 degrees. | obtuse angles |

An angle with the measure equal to 90 degrees | right angle |

An angle with measure equal to 180 degrees. | straight angles |

Two angles with a common vertex and side but no common interior points. | adjacent angles |

The point that divides, pr bisects, a segment into two congruent segments. | midpoint |

To divide into two congruent parts. | bisect |

A segment, ray, line, or place that intersects a segment at its midpoint | segment bisector |

A construction tool used to draw arcs. | compass |

A construction tool used to draw segments. A ruler without marks. | straightedge |

To draw using a limited set of tools, usually a compass and a straightedge. | construct |

A geometric drawing that uses a limited set of tools, usually a compass and a straightedge. | construction |

midpoint formula | |

A ray that divides an angle into two adjacent angles that are congruent. | angle bisector |

Two angles whose sides form two pairs of opposite rays. | vertical angles |

Two adjacent angles whose noncommon sides are oppisite rays. | linear pair |

Two angles whose measures have the sum 90 degrees. | complementary angles |

The sum of the measures of an angle and its complement is 90 degress. | complement of an angle |

Two angles whose meeasures have the sum 180 degrees. | supplementary angles |

The sum of the measure of an angle and its supplement is 180 degrees. | supplement of an angle |

Created by:
dhmahlman