| A | B |
|---|
| coordinate plane | the x axis and y axis |
| x-axis | horizontal number line |
| y-axis | vertical number line |
| origin | the intersection of the x and y axis |
| quadrants | the axes divide the coordinate plane into 4 |
| ordered pair | names a point with an x and y coordinate |
| x-coordinate | how far right or left on the x-axis a point lies |
| y-coordinate | how far up or down on the y-axis a point lies |
| collinear | points that lie on the same line |
| noncollinear | points that do not lie on the same line |
| plane | undefined |
| line | undefined |
| point | undefined |
| space | boundless, three-dimensional set of all points |
| coplanar | points that lie on the same plane |
| area | the amount inside of a figure |
| perimeter | distance around a figure |
| Pythagorean Theorem | In a right triangle, the sum of the squares of the measures of the legs equals the square of the measure of the hypotenuse |
| distance formula | distance between two points in a coordinate plane |
| midpoint | the point M between two points P & Q such that PM=MQ |
| bisect | cuts in half |
| theorem | a statement that is assumed to be true |
| proof | a logical argument in which each statement is backed up by a statement assumed to be true |
| angle | defined by two rays |
| ray | extends indefintely in one direction |
| sides | two rays that make an angle |
| vertex | the common endpoint of two rays |
| interior | the region inside of an angle |
| exterior | the region outside of an angle |
| degrees | the units that angles are measured in |
| protractor | a tool to find the measure of an angle |
| right angle | an angle that is exactly 90 degrees |
| obtuse angle | an angle that is greater than 90 degrees, but less than 180 degrees |
| acute angle | an angles that is less than 90 degrees |
| congruent segements | segments with the same length |
| angle bisector | divides an angles into two congruent parts |
| perpendicular | intersecting lines that form right angles |
| adjacent angles | angles that have a common vertex and a common side |
| vertical angles | two nonadjacent angles formed by two intersecting lines |
| linear pair | adjacent angles whose noncommon sides are opposite rays |
| supplementary angles | angles whose sum is 180 degrees |
| complementary angles | angles whose sum is 90 degrees |
| segment bisector | a line, plane or segment that cuts a segment in half |
| straight angle | an angle exactly equal to 180 degrees |
