Geometry Crossword Puzzle

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