Math Crossword Puzzle

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Across
  1. 3. is a parallelogram with all four sides congruent
  2. 4. the point of concurrency of the medians of triangle
  3. 5. which is a logical argument in which each statement you make is supported by a statement that is accepted as true
  4. 7. two figures that ahve the same shape and size
  5. 8. is an extra line or segment drawn in a figure to help analyze geometric relationships
  6. 9. is a quadrilateral with both pairs of opposite sides parallel
  7. 14. lie in the region between lines q and r
  8. 15. is a parallelogram with four right angles
  9. 16. are lines that do not intersect and are not coplanar
  10. 17. the point of concurrency of the perpendicular bisectors of a triangle
  11. 18. is a parallelogram with four congruent sides and four right angles
  12. 19. of a triangle is segment with endpoints being a vertex of a triangle and the midpoint of the opposite side
Down
  1. 1. of a triangle is a segment from a vertex to the line containing the opposite side and perpendicular to th line containing that side
  2. 2. is a comparison of two quantities using division
  3. 4. use figures in the coordinate plane and algebra to prove geometric concepts
  4. 6. lie in the two regions that are between lines q and r
  5. 10. is a quadrillateral with exactly one pair of parallel sides
  6. 11. of a polygon is a segment that connects any two nonconsecutive vertices
  7. 12. is the side located between two consecutive
  8. 13. the point of concurrency of the altitudes of a triangle