Across
- 3. constant is the ratio between the circumference and diameter of a circle
- 8. arcminute, 1° = 60′
- 9. line that start from point A
- 10. arcsecond, 1′ = 60″
- 11. the angle between two intersecting arcs of great circles of a sphere measured by the plane angle formed by the tangents to the arcs at the point of intersection
- 13. a part of the circumference of a circle or other curve.
- 14. formed by two rays
Down
- 1. forms by the two rays or arms at a common vertex
- 2. same shapes, not same size
- 3. at an angle of 90° to a given line, plane, or surface.
- 4. line from point A to point B
- 5. a straight one-dimensional figure that does not have a thickness, and it extends endlessly in both directions
- 6. a unit used to represent the measurement of an angle
- 7. = 90°
- 12. two lines that never intersect