Geometry tic-tac-toe

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Across
  1. 3. Divide into two equal parts.
  2. 7. A slide that moves points in the same distance and direction.
  3. 9. triangle A triangle that has two sides of equal length.
  4. 10. A four-sided polygon.
  5. 12. To have a common point.
  6. 15. angles Two angles that equal to 90 degrees
  7. 16. same shape and size.
  8. 17. Form by two rays with the same end point.
  9. 18. angles Two angles that equal to 180 degrees
  10. 20. The point that divides a line segment into two congruent segments.
Down
  1. 1. Angles Two angles that form opposite rays.
  2. 2. An enlargement or reduction of a figure.
  3. 4. Bisector A line, segment, or ray that is perpendicular to the segment at its midpoint.
  4. 5. angle Angle less than 90 degrees.
  5. 6. lines Two lines that do not intersect.
  6. 8. A turn around a designated point.
  7. 11. A series of connected line segments that starts and ends at the same place and does not intersect itself anywhere in between.
  8. 13. A line that consists of one midpont and all the pants of the line on one side of the endpoint
  9. 14. A conjecture that is proven.
  10. 19. A flip across a designated line.