geometry
Across
- 1. a flat surface on which a straight line joining any two points on it would wholly lie.
- 2. an angle whose sides lie in opposite directions from the vertex in the same straight line and which equals two right angles.
- 4. a part of a figure cut off by a line or plane intersecting it.
- 5. a unit of measurement of angles, one three-hundred-and-sixtieth of the circumference of a circle
- 7. the exact middle point of a line segment.
- 10. an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
- 12. a straight or curved continuous extent of length without breadth.
- 13. a person exercising government or dominion.
Down
- 1. an instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge.
- 3. lines that meet each other at a 90 degree angle.
- 6. each angular point of a polygon, polyhedron, or other figure.
- 8. a dot or other punctuation mark, in particular a period.
- 9. the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
- 10. any of a set of straight lines passing through one point.
- 11. Two lines that never cross with each other