| Term | Definition |
|---|
| Diameter | A segment that passes through the center of a cirlc and has both endpoints on the cirlce |
| Radius | A segment that has one end point on the cirlce and the other in the center |
| Arc | Part of the cirlce |
| Chord | A segment thas has both endpoints on the cirlce |
| Semicircle | A half oc a circle |
| Central Angle | An angle with a vertex at the center of a circle and whose sides are radii of the circle |
| Vertex | the point of intersection of lines or the point opposite the base of a figure |
| Obtuse Angle | between 90 and 180 degrees, an angle between 90 and 180 degrees |
| Acute | extremely sharp or intense |
| Right Angle | the 90 degree angle between two perpendicular lines |
| Straight Angle | an angle of 180 degrees |
| pi | The ratio of a circles circumference C to its diameter D |
| circumference | The Distance Around A Circle |
| Area | A part of an object or surface |
| Square Root | a number that when multiplied by itself equals a given number |
| Trapezoid | a quadrilateral with two parallel sides |
| Quadrilateral | a four-sided polygon |
Combine with other sets
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