Geometry Crossword Puzzle

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Across
  1. 5. a straight line from the center to the circumference of a circle or sphere
  2. 6. extends indefinitely in both directions
  3. 7. specifies an exact location
  4. 10. the perimeter of a circle
  5. 12. the likelihood of something happening
  6. 13. the number of unit squares that can be contained within a plane figure
  7. 15. marks the point at which the segment is divided into two equal segments
  8. 17. each angular point of a polygon, polyhedron, or other figure
  9. 18. a line segment that bisects one of the vertex angles of a triangle
Down
  1. 1. the ratio between two amounts based on the expected probability
  2. 2. a point or line common to lines
  3. 3. a four-sided figure
  4. 4. an algebraic expression consisting of three terms
  5. 7. a plane figure with at least three straight sides and angles
  6. 8. the distance around a two dimensional shape
  7. 9. a plane figure with three straight sides and three angles
  8. 11. when three or more points lie on a straight line
  9. 12. an arrangement where order matters
  10. 14. a straight line going through the center of a circle connecting two points on the circumference
  11. 16. 3.14