2D Shapes

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Across
  1. 4. What does the D stand for in 2D shapes
  2. 6. Opposite side lengths in this shape are equal
  3. 8. I am round in shape
Down
  1. 1. in the shape of a window
  2. 2. A signpost is in the shape of this
  3. 3. A circle is in this shape
  4. 5. A circle has _ corners
  5. 7. How many side lengths does a triangle have?