Geometry Crossword

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Across
  1. 3. Lines that never intersect.
  2. 7. Two angles whose sum is a right angle.
  3. 8. The measure of a region's size on a surface.
  4. 9. A collection of points extending along one dimension.
  5. 14. Lines that intersect to form a right angle.
  6. 15. An angle measuring 90 degrees.
Down
  1. 1. The perimeter of a circle.
  2. 2. A four-sided polygon.
  3. 4. A 2d sheet defined by any three points.
  4. 5. An angle less than 90 degrees.
  5. 6. Two angles whose sum is 180 degrees.
  6. 10. An angle more than 180 degrees.
  7. 11. The point where two lines meet.
  8. 12. Measure of a turn between two intersecting lines.
  9. 13. A location marked by a coordinate.