Across
- 2. The length of a straight line through the center of a circle.
- 7. Written on or in a surface.
- 8. A line closing a plane area.
- 10. Being everywhere equidistant and not intersecting.
- 11. Being essentially comparable to something.
- 12. A round three-dimensional closed surface.
- 13. A group of nearly parallel lines of electromagnetic radiation.
Down
- 1. A four-sided polygon.
- 3. Corresponding in character or kind.
- 4. A surface generated by rotating a line around a fixed line.
- 5. A point equidistant from the ends of a line or the extremities of a figure.
- 6. The length of the closed curve of a point.
- 8. A primitive notion that models an exact location.
- 9. A Euclidean space of Dimension two denoted e^2.
- 12. A straight line that intersects a curve at two or more points.