You can create a hyperbola from the creases made by folding a dot outside a circle onto the circle.

- Draw a circle on a light piece of paper and place a dot somewhere outside the circle. You will need to be able to see the circle and the dot through the paper, so draw the circle with a dark line. Alternately, you can cut a small hole where the dot is so you can see the circle underneath as you fold. Or you can place the dot on the edge of the paper.
- Fold the paper so the dot lands on the circle. Open.
- Fold the paper again so the dot lands on another spot on the circle. Open
- Repeat several more times. Each time the dot should land somewhere else on the circle. You will see a hyperbola emerge from the envelope of lines.

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