| A | B |
| radical sign | used to indicate the square root |
| irrational numbers | Nonrepeating, nonterminating decimals |
| acute angle | has a measure greater than 0 degrees and less than 90 degrees |
| congruent | figures that have the same size and shape |
| obtuse triangle | has one angle greater than 90 degrees |
| Pythagoream Theorem | Describes the relationship between the lengths of the legs and the hypotenuse in a right triangle. |
| distance formula | Used to find the length of a segment on a coordinate plane. |
| scalene triangle | Has no congruent sides |
| straight angle | Has a measure of 180 degrees |
| perfect square | Rational numbers whose square roots are whole numbers |
| real numbers | The set of rational numbers together |
| square root | One of the 2 equal numbers of a factor; ex. 5 is the square root of 25 |
| legs | The sides that are adjacent to the right angle of a right triangle. |
| hypotenuse | The side opposite the right angle in a right triangle |