Geometry words

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Across
  1. 3. two polygons with the same shape, but not the same size.
  2. 6. a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
  3. 7. a four-sided plane rectilinear figure with opposite sides parallel.
  4. 9. a closed figure having all the interior angles less than 180.
  5. 11. a polygon that is the same shape, has the same length of sides, and has the same interior angles as the polygon it is being compared to.
Down
  1. 1. a quadrilateral with only one pair of parallel sides.
  2. 2. a polygon that has at least one interior angle greater than 180 degrees.
  3. 4. a plane figure with four equal straight sides and four right angles.
  4. 5. is a four-sided figure.
  5. 8. a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.
  6. 10. an arrangement of shapes closely fitted together, especially of polygons in a repeated pattern without gaps or overlapping.