What is a upside down triangle called?

Answer 1

In mathematics an upside down triangle corresponds to the gradient operator and is sometimes called "del".

The Greek symbol of an upside down triangle is called "Nabla".

Answer 2

I cant really say for my self but i will try -

it is called...-

nabla -

lol -

Answer 3

its very hard that is why i asked i don't k

Answer 4

An upside down triangle is called an angle.