| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| It's an ellipse with an eccentricity of zero | a circle | FJ | GEOMETRY | 2007-10-23 | #5317 | ||
| In plane geometry, a chord is a line segment connecting 2 points that lie on this shape | a circle | $800 | DJ | GEOMETRY | 2006-05-24 | #5008 | |
| In this plane figure, all the points are equidistant from the center | a circle | $200 | J | MATH | 1994-02-15 | #2182 | |
| A closed curve in which every point is equidistant from the center | a circle | $600 | DJ | GEOMETRY | 1985-04-02 | #147 |