| A | B |
|---|
| conjecture | unproven statement based on observations |
| inductive reasoning | a process that includes looking for patterns and making conjectures |
| postulates | rules that are eccepted without proof. aka axioms |
| cooridinates | The real number that corresponds to a point on a line |
| coplanar | Points that lie on the same line |
| ray | Part of a line that consists of a point, called an initial point, and all points on the line that extend in one direction. |
| congruent segments | Segments that have the same length |
| complementary angles | Two angles whose measures have the sum 90 degrees. |
| distance formula | The distance between two points. p. 19 |
| line | An infininite amount of points. |
| segment addition postulate | If B is between A and C, then AB + BC = AC, If AB + BC = AC, then B is between A and C. |
| adjacent angles | Two angles with a common vertex and side but no common interior points. |
| angle bisector | A ray that divides an angle into two adjacent angles that are congruent. |
| vertical angles | Two angles whose sides form two pairs of opposite rays. |
| right angle | A ninety degree angle |
| area of a square | Side squared |
| area of a rectangle | Length times width. |
| collinear | points on the same line |
| counterexample | an example that disproves a conjecture |
| axioms | a postulate, an unproven conjecture |
| linear pair | two points or coordinate set up (x,y) |
| line segment | a segment of a line with two end points. |
| opposite rays | two rays with the same initial pt. extending in opposite directions |
| midpoint | the point which divides a segment into two equal portions |
| midpoint formula | [(x1+x2)/2,(y1+y2)/2] |
| 3 undifined terms | point, line, plane |
| angle | 2 different rays with a common point |
| angle addition postulate | m<abc + m<cbd =m<abd |
| segment bisector | a ray that divides an angle in half |
| supplementary angles | two angles which the degree's sum is 180 degrees |
| acute angle | any angle less then 90 degrees |
| obtuse angle | any angle more then 90 degrees |
| perimeter | the sum of the sides of a shape |
| area of a triangle | one half base times height |
| are of a circle | pie times radius squared |
