Shapes!

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Across
  1. 3. you can stand on the ____.
  2. 4. curved inwards.
  3. 5. a door is shaped as a ____.
  4. 8. a flat shape with 4 straight sides where opposite sides are parallel.
Down
  1. 1. if its not 2D its ____.
  2. 2. i have no corners and im shaped like a ball.
  3. 3. if you cut me in half both of my halves would be ____.
  4. 4. Curved Outwards.
  5. 6. a three sided polygon. The sum of the angles equal 180 degrees.
  6. 7. The same shape and size, but we are allowed to flip, slide or turn.