geometry crossword

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Across
  1. 3. add to 180 degrees
  2. 5. splits the circle into a semicircle
  3. 7. connects the midpoints of two sides of a triangle
  4. 10. how to find a missing side of a right triangle
  5. 12. outcome of one event does not influence the outcome of another
  6. 14. transformation that multiplies dimensions by a chosen factor
  7. 15. two-dimensional closed figure made up of straight-line segments
  8. 16. set of points a fixed distance from the center and is defined by a central angle
  9. 17. line segment with both endpoints on a circle
  10. 18. the first event or the second event (or both) occur
  11. 19. diagram with fact and conclusion bubbles
  12. 21. formed by two radii of a central angle and arc
Down
  1. 1. divides into two equal parts
  2. 2. transformation sliding a figure to a new location
  3. 4. add to 90 degrees
  4. 6. both the first and the second event occur
  5. 8. transformation over a line of reflection
  6. 9. line segment that goes from one corner to another
  7. 11. line meeting another at a right angle
  8. 13. a point on a line that divides it into two equal parts
  9. 20. turning a figure around a fixed point