Geometry Crossword Puzzle

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Across
  1. 4. Angle An angle less than 90 degrees but greater than 0 degrees
  2. 8. A straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
  3. 9. a straight line extending from the center of a circle or sphere to the circumference or surface
  4. 10. A quadrilateral having both pairs of opposite sides parallel to each other
  5. 11. The sum of two angles equals 180 degrees
Down
  1. 1. Angle An angle greater than 90 degrees but less than 180 degrees
  2. 2. triangle A triangle with three unequal sides and angles
  3. 3. A parallelogram having four right angles
  4. 5. The sum of two angles equals 90 degrees
  5. 6. triangle A triangle with all sides and angles equal to each other
  6. 7. triangle A triangle with one internal angle equal to 90 degrees
  7. 9. A equilateral parallelogram having oblique angles