Across
- 3. The amount of three-dimensional space
- 6. Two sides of equal length
- 8. Not rational numbers
- 9. Segment of the circumference of a circle
- 11. a line that passes through two lines in the same plane at two distinct points
- 13. an equation in which two ratios are set equal to each other
- 14. Curved outwards
- 15. A sphere in two equal halves
- 17. One interior angle greater than 180°
- 18. Arithmetic mean position of all the points in a figure
- 19. The middle of a data set
- 20. Perpendicular segment
Down
- 1. A regular quadrilateral
- 2. Lie on a single straight line
- 4. a line segment joining two vertices of a polygon
- 5. A geometric plane that contains multiple points
- 7. Angle between any side of a shape, and a line extended from the next side.
- 10. in the same plane
- 12. share a common center
- 16. Known for his treatise on geometry
- 17. equal to the ratio of the side adjacent to an acute angle