1st Period Androli Math
Order by
21 terms
Terms | Definitions |
|---|---|
 Point | A placeholder in space; 1 dimensional |
| Line | An infinite set of points extending in both directions for infinity |
| Plane | Two-Dimensional infinite set of points |
| Line segment | a part of a line with two endpoints |
| ray | a straight line extending from a point |
| angle | two rays with a common endpoint |
| vertex | common endpoint |
| triangle | the union of three line segments |
| union | everything contained in both sets whether or not they are common |
| intersect | the only points common to both sets |
| acute angle | an angle less than 90 degrees but more than 0 degrees |
| obtuse angle | an angle between 90 and 180 degrees |
| right angle | the 90 degree angle between two perpendicular lines |
| straight angle | an angle of 180 degrees |
| collinear points | Points that lie on the same line |
| betweenness | given two numbers, another number is said to be between those two numbers if it is greater than the first but less than the second |
| triangle inequality | The sum of the lengths of any 2 sides of a triangle is greater than the length of the third side. |
| midpoint | the point where a line segment is bisected |
| postulates | statements that we accept without proof |
| definition | has to be true |
| transitive property of equality | if a=b and b=c, then a=c |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.