| A | B |
|---|
| adjacent angles | share a vertex and one side |
| angle | made up of two rays with a common endpoint |
| chord | an angle whose vertex is the center of a circle |
| circle | set of points in a plane that are all the same distance from the center |
| compass | geometric tool you can use to draw circles and arcs |
| complementary angles | their sum measures 90 degrees |
| congruent angles | angles that have the same measure |
| diameter | a segment that passes through the center of a circle |
| parallel lines | lines in the same plane that do not intersect |
| parallelogram | a quadrilateral that has both pairs of opposite sides parallel |
| perpendicular lines | lines that intersect to form right angles |
| polygon | closed plane figure formed by 3 or more line segments that do not cross |
| quadrilateral | polygon with four sides |
