geometry

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Across
  1. 5. bisector,a line or ray that divides an angle into two equal parts
  2. 10. lines,two liones that never intersect
  3. 11. that lie on the same plane
  4. 14. end point of an angle
  5. 16. lines that intersect at 90 degree angle
  6. 18. interior angles,supplementary
  7. 19. line that extends indefinitely in one direction
  8. 20. to 90 degrees
Down
  1. 1. than 90 degrees
  2. 2. altitudes intersect in a triangle
  3. 3. with no size or shape
  4. 4. of two rays at an endpoint
  5. 6. a segment joining a vertex
  6. 7. medians of a triangle intersect at a point
  7. 8. enlargement or reduction of a figure
  8. 9. segment,two segments that have the same length
  9. 12. angles,congruent angles
  10. 13. than 90 degrees
  11. 15. angle theorem,if two angles are vertical,then they are congruent.
  12. 17. made up of points with no thickness or width.