Geometry Crossword Puzzle

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Across
  1. 2. two angles with a common side but no common interior points
  2. 4. two non adjacent angles formed by two intersecting lines
  3. 11. an angle whose measure is greater than 90 degrees and less than 180 degrees
  4. 12. the length of a line segment from its center to its perimeter
  5. 14. the point that bisects the segment into two congruent segments
  6. 15. a point corresponds to one and only one number on the ruler
  7. 16. any straight line segment that passes through the center of the circle and whose endpoint
  8. 18. a part of a line that starts at an endpoint and extends forever in one direction
  9. 19. geometric elements of equal measure
Down
  1. 1. the distance around a two dimensional shape
  2. 3. the distance around the circle
  3. 5. angle a 90 degree angle
  4. 6. the sum of two angles that measure 180
  5. 7. point where the x-axis and y-axis meet in a coordinate grid
  6. 8. the absolute value of the difference of the coordinates
  7. 9. the line that divides something into equal parts
  8. 10. a polygon with four edges or sides and four vertices or corners
  9. 11. ray two rays that have a common endpoint and form a line
  10. 13. two or more lines that meet or cross at a point
  11. 17. the side that stretches from one leg to the other