| A | B |
|---|
| the hours from midnight to noon; morning | a.m. |
| the hours from noon to midnight; after the middle of the day | p.m. |
| the product of one whole number and another whole number greater than zero | multiples |
| lines that cross | intersecting lines |
| lines that stay the same distance apart; lines that do not cross | parallel lines |
| lines that intersect and make square corners | perpendicular lines |
| the opening between two lines or segments that intersect | angle |
| an angle that is smaller than a right angle | acute angle |
| an angle that is larger than a right angle but smaller than a straight angle | obtuse angle |
| a square angle (corner) | right angle |
