| A | B |
|---|
| acute angle | an angle whose degree measure is less than 90 degrees. |
| adjacent angles | tqo angles in the same plane that have a common vertex and a common side, but no common interior points. |
| angle | 2 collinear rays with same endpoint |
| angle bisector | ray QS,is the bisector of angle PQR if s is in the interior of the angle and angle PQS is congruent to RQS. |
| area | the number of square units contained in the interior of a figure |
| between | b is between a and c if only a,b, and c are collinear and ab+bc=ac. |
| collinear | points that lie on the same line |
| complementary angles | two angles whose degree measures have a sum of 90 degrees |
| congruent | angles that have the same measure |
| coplanar | points that lie on the same plane |
| degree | a unit of meaure used in measuring andgles and arcs of circles. |
| intersection | the set of points that are in both points |
| line | extends indefinitely w/ no thickness or width. arrows at each end: named by lowercase script letters or 2 capitals |
| linear pair | a pair of adjacent angles whose noncommon sides are opposite rays |
| measure | the length of AB written AB, is the distance between A and B |
| midpoint | a point is the midpoint of circle p, then points A and B and all points on the circle interior to the angle form a minor AB |
| noncollinear | points that do not lie on the same line |
| obtuse angle | an angle w/ a degree measure greater than 90 and less than 180 |
| opposite rays | two rays BA and BC such that B is between A and C |
| paragraph proof | a prooph written in the form of a paragraph |
