Geometry Puzzle

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Across
  1. 3. Three or more points that lie on the same straight line
  2. 6. A line or ray that will divide an angle into 2 equal parts
  3. 9. Angles that share a common vertex or side
  4. 12. a segment, line, or plane that intersects segments at its midpoint
  5. 13. A precise location or place on a plane. Usually represented by a dot.
  6. 14. measure less than 90 degrees.
  7. 17. Angles that equal 180 degrees
  8. 18. an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
  9. 20. Angles that are adjacent to each other and are supplementary
Down
  1. 1. Angles that have the same measure
  2. 2. exceeding 90 degrees but less than 180 degrees.
  3. 4. Two lines that intersect at a right angle
  4. 5. angles Angles that are directly across from each other on intersecting lines
  5. 7. is a flat, two-dimensional surface that extends indefinitely.
  6. 8. A line that extends from an endpoint indefinitely in one direction
  7. 10. the intersection of two or more lines or curves.
  8. 11. lying or acting in the same plane.
  9. 15. Angles that are equal to 90 degrees
  10. 16. is straight has no thickness, and extends in both directions without end
  11. 19. A measurable part of a line consisting of two endpoints