Constructing a regular nonagon (approximately) inside a circle

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It's not possible to construct a regular nonagon or enneagon (9 sided regular polygon) using a straightedge and a compass. However, you can get so close that you won't be able to see the difference. This video shows you how.

The nonagon gets (almost) constructed inside a given circle, that becomes the circumcircle of the nonagon.

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Mine ended up with 8 sides…

Update: I tried again. Turns out, the first time I was using the length between the second big circle and the second circle as my side length. My second attempt worked!

methylenegrey
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Nonagon infinity opens the door
Nonagon infinity opens the door
Wait for the answer to open the door
Nonagon infinity opens the door
Ooooh!!!

NayrbRellimer
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The nonagon is impossible to construct with a ruler and compass. Here's how to get close enough.

Cell
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I hate it actually u should think for kids

rashidahashmi
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People really learn that? That's fairly messy

meridianherschel