Foundational Geometry

123456789101112131415
Across
  1. 4. Adds to 180 degrees
  2. 6. Two lines that intersect at 90 degrees
  3. 9. Adds to 90 degrees
  4. 12. On the same line
  5. 14. Part of a line starting and ending point
  6. 15. Splitting in half *two equal parts
Down
  1. 1. Two adjacent angles whose common sides are opposite rays
  2. 2. On the same plane
  3. 3. Two lines that will never intersect
  4. 5. Flat surface
  5. 7. A location
  6. 8. 2 rays that meet at a common point(vertex)
  7. 10. Lines that don't intersect an are not coplanar
  8. 11. Straight extends in both directions
  9. 13. Starting point continues in one direction