Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Chapter 1 Vocabulary
Big Ideas Geometry Chapter 1 Vocabulary
| Term | Definition |
|---|---|
| acute angle | An angle that has a measure greater than 0° and less than 90° |
| adjacent angles | Two angles that share a common vertex and side, but have no common interior points |
| angle bisector | A ray that divides an angle into two angles that are congruent |
| angle | A set of points consisting of two different rays that have the same endpoint |
| axiom/postulate | A rule that is accepted without proof |
| complementary angles | Two angles whose measures have a sum of 90° |
| collinear points | Points that lie on the same line |
| congruent angles | Two angles that have the same measure |
| congruent segments | Line segments that have the same length |
| construction | A geometric drawing that uses a limited set of tools, usually a compass and a straightedge |
| coordinate | A real number that corresponds to a point on a line |
| coplanar points | Points that lie in the same plane |
| defined terms | Terms that can be described using known words, such as point or line |
| distance between two points | The absolute value of the difference of two coordinates on a line |
| endpoints | Points that represent the ends of a line segment or ray |
| exterior of an angle | The region that contains all the points outside of an angle |
| interior of an angle | The region that contains all the points between the sides of an angle |
| intersection | The set of points two or more geometric figures have in common |
| line | has one dimension. It is represented by a line with two arrowheads, but it extends without end. |
| line segment | A part of a line that consists of two endpoints and all points on the line between the endpoints |
| linear pair | Two adjacent angles whose noncommon sides are opposite rays |
| measure of an angle | The absolute value of the difference between the real numbers matched with the two rays that form the angle on a protractor |
| midpoint | The point that divides a segment into two congruent segments |
| obtuse angle | An angle that has a measure greater than 90° and less than 180° |
| opposite rays | Two rays that have the same endpoint and form a line |
| point | A location in space that is represented by a dot and has no dimension |
| right angle | An angle that has a measure of 90° |
| plane | A flat surface made up of points that has two dimensions and extends without end, and is represented by a shape that looks like a floor or a wall |
| ray | A part of a line that consists of an endpoint and all points on the line on one side of the endpoint |
| segment | A part of a line that consists of two endpoints and all points on the line between the endpoints |
| segment bisector | A point, ray, line, line segment, or plane that intersects the segment at its midpoint |
| sides of an angle | The rays of an angle |
| supplementary angles | Two angles whose measures have a sum of 180° |
| vertex of an angle | The common endpoint of the two rays that form an angle |
| weighted average | The average of two points on a number line that are weighted unequally |
| straight angle | An angle that has a measure of 180° |
| undefined terms | Words that do not have formal definitions, but there is agreement about what they mean In geometry, the words point, line, and plane |
| vertical angles | Two angles whose sides form two pairs of opposite rays |
Created by:
PRO Teacher
Fulghum
Popular Math sets