Geometry w&d

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Across
  1. 4. a segment that has one endpoint at the center of the circle and the other endpoint on the circle
  2. 5. do not share a vertex
  3. 6. the ratio of corresponding linear measurements of two similar figures
  4. 7. part of a line
  5. 8. a quadrilateral with both pairs of opposite sides parallel
  6. 10. is smaller than its corresponding semicircle
  7. 12. point that bisects a segment into two congruent segments
  8. 14. the set of all points in three dimensions
  9. 17. three or more lines intersect at one point
  10. 18. point of concurrency
Down
  1. 1. an angle formed by a horizontal line and the line of sight to an object that is above the horizontal line
  2. 2. have the same shape but not necessarily the same size
  3. 3. do not share a side
  4. 7. a line that intersects a circle at two points
  5. 9. a segment that contains the center of a circle and has both endpoints on the circle
  6. 11. noncollinear points
  7. 12. is larger then its corresponding semicircle
  8. 13. has no dimension
  9. 15. extends in two different directions without end
  10. 16. the quotient of two quantities