Geometry Crossword!

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Across
  1. 2. A straight line from the middle to the perimeter of a circle
  2. 4. Poorly balanced
  3. 5. The extent of a surface
  4. 6. Obtained by adding two numbers
  5. 7. Being alike, has an alike quality
  6. 11. the space between two objects
  7. 12. An angle that's less than 90 degrees but isn't anymore than 0
  8. 13. Four-sided polygon
  9. 15. Has four equal sides
  10. 16. 90 degree angle, two perpendicular lines intersecting
Down
  1. 1. The act of changing form
  2. 3. Three sided polygon
  3. 8. Having four right angles
  4. 9. In an inner area
  5. 10. When the sides of a quadrilateral are equal and parallel
  6. 14. A shape with a circular bottom and triangular top