| A | B |
| legs | In a right triangle, the sides that include the right angle |
| square root | one of the two equal factors of a number |
| hypotenuse | in a right triangle, the side opposite the right angle |
| area | the number of square units needed to cover a given surface |
| perfect square | the square of a whole number |
| circumference | the distance around a circle |
| pythagorean theorem | the theorem stating that in a right triangle, the square of the length of the hypotenuse is equal to |
| radical sign | the symbol used to represent the square root of a number |
| perimeter | the distance around a polygon |