Geometry Crossword

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