| A | B |
|---|
| A pair of lines that meet at a point | intersecting lines |
| The mathemathics of points, lines, shapes, etc. | geometry |
| a set of points that form a straight path and continue infinitely; defined by 2 points | line |
| a pair of angles that form a 180-degree angle | supplementary lines |
| lines that intersect at a 90 degree angle | perpendicular lines |
| lines that will never insect. | parallel lines |
| an angle whose measure is greater than 90 degrees and less than 180 degrees | obtuse angle |
| an angle whose measure is less than 90 | acute angle |
| a pair of angles that form a 90 degree angle | complementary angles |
| a pair of angles that share a common vertex and a common side | adjacent angles |
| a pair of angles that are in the same position relative to the parallel lines and the transversal | corresponding angles |
| angle formed by perpendicular lines | right angle |
| A straight set of points with one endpoint and continues infinitely | ray |
| the point where to rays intersect | vertex |
| the distance around an object | perimeter |
| a pair of nonadjacent angles with a common vertex | vertical angles |
| an angle whose measure is 180 degrees | straight angle |
| An infinite set of points that form a flat surface. | plane |
| a place or position in space | point |
| two rays with the same endpoint | angle |
