Informal Geometry - Vocab

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Across
  1. 2. the length of a line segment
  2. 5. adjacent angles that lie on a line
  3. 8. two angles that add up to 180
  4. 12. two angles that add up to 90
  5. 15. a point on a line that is divides the line into two congruent halves
  6. 16. angles formed by intersecting lines and only share a common vertex
  7. 17. angles that are greater than 90 but less than 180 degrees
  8. 18. when angles are line segments have equal measure
  9. 19. the corner of an angle, polygon, or polyhedron
Down
  1. 1. a line or ray that divides an angle into two congruent parts
  2. 3. when points all lie on the same plane
  3. 4. a geometric figure made up of at lease 2 points
  4. 6. an angle that is 90 degrees
  5. 7. when points all lie on the same line
  6. 9. when two lines, rays, or segments intersect to form a right angle
  7. 10. a line with endpoints
  8. 11. a flat surface made up of 3 or more noncollinear points
  9. 13. angles that share a common vertex and a common side
  10. 14. angles that are less than 90 degrees