If all points are coplanar, why isn't it a surface?

[RTCool]

@rod2

…can I please appeal to the US users to stop using imperial.

I created a thread on just that topic here:

Imperial vs. Metric Units

Continuing a discussion from here that keeps coming up in this international forum: Why does the USA still rely on imperial units of measure? I guess the answer is “Freedom!” Just in case no one thinks we aren’t aware or have no sense of humor, this from last week’s Saturday Night Live: [Washington's Dream - SNL] (I’m hoping YouTube doesn’t have some geofencing or something preventing people outside the US from viewing the video – let me know.)

Again, people outside the US may need a VPN to view the video - it seems to vary.