Probably
(require lang/posn)
--- nadeem
On Tue, Aug 6, 2019 at 1:19 PM Kevin Forchione wrote:
> Hi guys,
> I love working with the 2htdp/universe and 2htdp/image packages. But
> polygon requires posts (and some of the other functions do too).
> 2htdp/image doesn’t include a definition. What’s the best library to
> require for these? I tried making my own struct and was surprised that the
> function didn’t like it. Apparently it wants a specific post?
>
> Kevin
>
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