Geometry Crossword Puzzle

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