| A | B |
|---|
| number model | a number sentence |
| number + word notation | using numbers and words (ex. 10 billion) |
| obtuse angle | an angle with a measure more than 90 degrees and less than 180 degrees |
| open number sentences | a number sentence in which one or more variables hold a missing number (ex. 9+___ = 15) |
| ordered number pair | two numbers in a specific order used to locate a point on a grid (ex. 2,4) |
| percent | out of a hundred |
| perimeter | the distnace around a closed figure. |
| parallel | lines that never cross or meet |
| perpendicular | crossing lines at right angles |
| polygon | any 2 dimensional figure made of 3 or more closed line segments that do not cross |
