| A | B |
|---|
| If Q is between P & R, then PQ+QR = | PR (Segment Addition Postulate) |
| If R is in the interior of angle PQS, then the measure of angle PQR + measure of angle RQS = | measure of angle PQS (Angle Addition Postulate) |
| If M is the midpoint of segment AB, then | AM=MB (Midpoint Theorem) |
| Points that lie on the same line are | collinear |
| Points that do not lie on the same line are | noncollinear |
| A boundless, three-dimensional set of all points | space |
| Undefined term - it extends indefinitely and has no thickness or width | line |
| Undefined term - has no size; represented by a dot | point |
| Undefined term - flat surface that extends indefinitely in all directions and has no thickness | plane |
| Area of a rectangle | length times width |
| Perimeter of a rectangle | 2 times length + 2 times width |
| a part of a line that consists of two points called endpoints and all the points between them | segment |
| the sum of the squares of the measures of the legs of a right triangle equals | the square of the measure of the hypotenuse (Pythagorean Theorem) |
| distance formula | d= square root of [(x2-x1)squared +(y2-y1)squared] |
| the point between P and Q such that PM=MQ | midpoint |
| Midpoint Formula | [ (x1+x2)/2 , (y1+y2)/2 ] |
| any segment, line or plane that intersects a segment at its midpoint | segment bisector |
| extends indefinitely in one direction | ray |
| two rays that form a line | opposite rays |
| a figure formed by two noncollinear rays with a common endpoint | angle |
| angle is measured in | degrees |
| Name for an angle that is 90 degrees | right angle |
| Name for an angle less than 90 degrees | acute angle |
| name for an angle less than 180 degrees but greater than 90 degrees | obtuse angle |
| angles that have the same measure are | congruent |
| a segment or line that divides an angle into two congruent angles | angle bisector |
| intersecting lines that form right angles | perpendicular |
| angles in the same plane that have a common vertex and a common side, but no common interior points | adjacent |
| two nonadjacent angles formed by two intersecting lines | vertical angles |
| adjacent angles whose noncommon sides are opposite rays | linear pair |
| vertical angles are ... | congruent |
| the sum of the measures of the angles in a linear pair is | 180 degrees |
| two angles whose measures have a sum of 180 | supplementary |
| two angles whose measures have a sum of 90 | complementary |
| perpendicular lines form how many right angles? | 4 |
| the intersection of two planes is a | line |
| the intersection of two different lines is a | point |
