Understanding the shape of quadrilaterals and classifying their attributes

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Across
  1. 5. polygon with four straight sides adn four vertices
  2. 6. a plain figure with four sides and four right angles, especially one with unequal adjacent sides, in contrast to a square
  3. 9. Triangles, pentagons, hexagons, octagons, circles
  4. 11. a quadrilateral with at least one pair of parallel sides, called the bases, and two non-parallel sides called the legs.
Down
  1. 1. a four-sided plane rectilinear figure with opposite sides parallel.
  2. 2. a straight-sided figure with at least three sides and angles, and typically five or more
  3. 3. a toy consisting of a light frame with thin material stretched over it, flown in the wind at the end of a long string.
  4. 4. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs.
  5. 7. A geometric Figure
  6. 8. four connecting sides that are all equal length
  7. 10. four sided geometric shape with all sides having equal length and opposite sides parallel