he has a paper airplane necklace
No, Leo did not invent the paper airplane.
In 1898 there was no airplane.
it look like a cross.
just like an airplane
Airplane.
It looks like an arrow pointing up.
It is aheavy fairly fat airplane with single propellor and mid wing design.
Well it depends on exactly what you want to make. Are you trying to come up with an art idea? Because you could look at an origami book and make something like that, or a fortune teller, or a paper airplane. But if you are talking about recycling or reusing paper, I'm not sure...
Look for a small symbol on the tray where the paper gets inserted into. It will usually have an arrow and also show which way the paper is supposed to be facing to scan into the fax properly.
You might be thinking of the energy symbol, which is a lightening bolt, might look like an arrow
If we are talking about a normal arrow, then no. if " -> " is rotated 90 degrees, it would not look the same as it did before. It would look something like this: ^ | Which would not be the same.