The Upside down T symbol indicates perpendicular lines.
That's a u
In sets it means intersects. like what is common in both sets
In mathematics, an upside down A means "for all".
Sounds highly unlikely. But did you mean 'the chicken upside down', or 'the egg upside down'?
A upside down rainbow means cheese or tacos
The only "mathematical" (it's really more geometrical) symbol I can think of fitting the description means "perpendicular."
pnworhd is an upside down pyramid. If you take pnworhd in script and turn in upside down you will get pyramid
someone once told me that it was like an upside down crucifix
The upside down purple triangle was actually used to identify Jehovah's Witnessess
Anokatoprosopus means upside-down face (i.e. some aliens or monsters have upside-down faces).
upside down pirate flag was flown to mean No quarter," we're going to kill all aboard".
Commonly used in the Spanish language, the use of the upside down question mark (or even an upside down exclamation mark) are used in questioning sentences.
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.
not catching luck
Turned upside down.
It's to do with "The Hum"
It is used in set theory to indicate intersection. The intersection of two sets, A and B, is the set of all elements that are in A as well as in B.
It means un-polo if it's an upside down p with a small diamond next to it.
Do you mean can you tell when your about to go upside down or that you can feel it when your already upside down? Because to the first, if your observant or have ridden the ride before, and the second, yes, you can tell when your upside down. > Your body would be able to feel the centre of gravity changing.
When younger people get brest cancer. They want to have the ribbon upside down. Sounds good to me.