| A | B |
|---|
| discrete | quantities that are counted |
| continuous | quantities that are measured |
| opposite | two numbers that are the same distance from zero on a number line |
| absolute value | the distance that a number is from zero on a number line |
| scientific notation | a number written as a number that is at least one but less than ten, multiplied by a power of ten |
| line | a straight arrangement of points that extends forever in opposite directions |
| endpoint | a point that marks the first point or the last point of a line segment |
| segment | two points on a line and all points between them |
| length of a segment | the measure of the distance between and including the two endpoints of a segment |
| midpoint | the point that divides a segment into two congruent parts |
| angle | a figure formed by two rays that have the same endpoint, called the vertex |
| ray | a part of a line that starts at a point, and extends forever in one direction |
| vertex | in an angle, where the two rays meet |
| central angle | an angle with its vertex at the center of a circle |
| right angle | an angle that measures 90 degrees |
| straight angle | an angle that measures 180 degrees |
| acute angle | an angle that measures between 0 and 90 degrees |
| obtuse angle | an angle that measures between 90 and 180 degrees |
| complementary angles | two angles whose measure have the sum of 90 degrees |
| supplementary angles | two angles whose measures have the sum of 180 degrees |
| vertical angles | two congruent angles formed by intersecting lines and facing in opposite directions |
| solution | a value of a variable that makes an equation true |
| solving an equation | the process of finding solutions |
| square root | one of two equal factors of a number |
| perfect square | a number whose square root is an integer |
| cube root | one of three equal factors of a number |
| perfect cube | a number whose cube root is an integer |
