Across
- 2. Double the radius
- 4. A part of a curve
- 7. A shape that has three vertices
- 9. Half of 2 across
- 10. two lines that run the same direction
- 11. The space between two intersecting lines or surfaces at or close to the point where they meet
Down
- 1. A quadrilateral figure that has two parallel and two nonparallel sides
- 3. Any of a set of straight lines passing through one point
- 5. The line segment between two point on a given curve
- 6. The intersection point of two sides of a plain figure
- 8. A shape with nine sides
- 10. A position in space