johnathons geometry puzzle

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Across
  1. 2. any of a set of straight lines passing through one point.
  2. 4. a part of the circumference of a circle or other curve
  3. 7. combining in such a way as to enhance or emphasize the qualities of each other or another
  4. 8. axis that is horizontal
  5. 9. the surface traced by a moving straight line (the generatrix) that always passes through a fixed point (the vertex).
  6. 11. Numerical measure of a line's inclination relative to the horizontal.
  7. 13. a flat surface on which a straight line joining any two points on it would wholly lie.
  8. 14. the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
  9. 15. the exact middle point
  10. 16. an angle greater than 90 degrees
Down
  1. 1. the extent or measurement of a surface or piece of land.
  2. 3. axis that is vertical
  3. 5. a straight line that bisects an angle or a line segment
  4. 6. each of the parts into which something is or may be divided
  5. 7. a symmetrical three-dimensional shape, either solid or hollow, contained by six equal squares.
  6. 10. the action of rotating around an axis or center
  7. 11. the trigonometric function that for an acute angle is the ratio between the leg opposite the angle when it is considered part of a right triangle and the hypotenuse.
  8. 12. the perimeter
  9. 13. to separate or to divide