| A | B |
|---|
| Coordinate Plane | A plane in which 2 perpendicular number lines intersect at their zero points |
| x-axis | the horizontal number line on a coordinate plane |
| y-axis | the vertical number line on a coordinate plane |
| origin | The intersection point of the x- and y- axis of the coordinate plane. Identified as the point (0,0) |
| quadrant | One of the 4 regions into which the x- & y-axis divide the coordinate plane |
| ordered pair | A pair of numbers used to locate a specific point on a plane of the form (x, y) |
| collinear points | points that lie on the same line |
| noncollinear points | points that do not lie on the same line |
| plane | a flat surface that extends indefinitely in all directions, but has no thickness |
| lines | extends indefinitely and has to thickness or width |
| points | usually represented by a dot, put has no size |
| space | the boundless, 3-dimensional set of all points |
| coplanar points | points that lie on the same plane |
| A = lw | formula for area of a rectangle |
| area | the number of square units inside a closed shape |
| perimeter | the distance around a figure |
| P = 2L + 2W | formula for perimeter of a rectangle |
| Pythagorean Theorem | in a right triangle, the sum of the squares of the measures of the legs is equal to the square of the measure of the hypotenuse |
| congruent | similar shapes that have the same measure |
| bisector | any segment, line, or plane that intersects at a midpoint |
| theorem | a general statement that has been proven true through postulates, definitions, algebraic properties, or rules of logic |
| postulate | a basic statement that has been accepted as true with no formal proof |
| proof | a logical argument in which each statement is back up by a statement that is accepted as true |
| paragraph (informal) proof | one type of proof written in paragraph form that explains why a conjecture is true. |
| angle | a figures consisting of 2 rays with a common endpoint |
| ray | a line with one endpoint and extends indefinitely in one direction |
| opposite rays | two rays that share the same endpoint and point in opposite directions |
| vertex | the common endpoint of 2 rays that form an angle |
| right angle | measures exactly 90 degrees |
| acute angle | measures less than 90 degrees |
| obtuse angle | measures more than 90 degrees |
| perpendicular lines | intersecting lines that form right angles |
| supplementary angles | two angles whose measures have a sum of 180 degrees |
| complementary angles | two angles whose measures have a sum of 90 degrees |
