In mathematics, an upside down A means "for all".
A upside down rainbow means cheese or tacos
Answer it
The Upside down T symbol indicates perpendicular lines.
pnworhd is an upside down pyramid. If you take pnworhd in script and turn in upside down you will get pyramid
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IgLoo
Anokatoprosopus means upside-down face (i.e. some aliens or monsters have upside-down faces).
It means un-polo if it's an upside down p with a small diamond next to it.
The upside down purple triangle was actually used to identify Jehovah's Witnessess
upside down pirate flag was flown to mean No quarter," we're going to kill all aboard".
Take a pyramid and turn it upside down so it is balanced on the point (pointed top), you have now turned a 3D shape upside down. Basically, upside down is to reverse the way the shape should normally appears.