Geometry vocab

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Across
  1. 1. a quadrilateral with two pairs of parallel
  2. 4. a quadrilateral with all sides of equal length
  3. 5. a polygon with 5 sides and 5 angles
  4. 7. the set of points equidistant from a central point
  5. 8. angles across from each other on an x
  6. 11. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
  7. 14. angles that add up to 90 degrees
  8. 17. a straight line extending from the center of a circle or sphere to the circumference or surface
  9. 18. a quadrilateral with one pair of parallel sides
  10. 19. used when trying to find a side of a right triangle
  11. 20. an angle less than 90 degrees but greater than 0 degrees
Down
  1. 2. a 90 degree angle
  2. 3. angles that add up to 180 degrees
  3. 6. the intersection point of two sides of a plane figure
  4. 9. two angles that form a straight line
  5. 10. a polygon having eight angles and eight sides
  6. 12. a quadrilateral with four right angles and four sides of equal length
  7. 13. a quadrilateral with two pairs of consecutive, equal sides
  8. 15. an angle greater than 90 degrees but less than 180 degrees
  9. 16. a quadrilateral with four right angles