Viewer 17-gons

Here's David's Heptadecagon:

But equally exciting have been these efforts by Numberphile viewers.

Note these are compass and straight edge constructions. That's the point.

 @dullahansolo

@dullahansolo

 Charles Via Facebook

Charles Via Facebook

 @ProgrammerHero

@ProgrammerHero

 @enfo14

@enfo14

  @JosselieNoirel calls this a   heptafaildecagon

@JosselieNoirel calls this a heptafaildecagon

 @kolekracaw used Geometer Sketch Pad

@kolekracaw used Geometer Sketch Pad

 Earlier effort by @kolekracaw

Earlier effort by @kolekracaw

 @FordFiesta_

@FordFiesta_

 @MrCamago

@MrCamago