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At right is a photo of a tree trunk. Sketch (or trace) the outline of the visible portion shown here. Indicate where slices should be made so that the cross-section is:

  1. One circular region (the region might not be a perfect circle, but it should be close).

  2. Three separate circular regions.

  3. A free form, amoeba-type shape.

    Look at the different points on the tree that are connected to the question.