This piece of paper was folded to trisect an angle of roughly 150 degrees
The angle formed by the solid lines is approximately 150 degrees, and by
folding, the dashed line was produced (the dashes highlight the relevant fold
line), which of course defines an angle of approximately 50 degrees.
Trisecting an angle of 150 degrees with a straight edge and compass is
impossible, but as you can see above, it can be done using origami.
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