It is usually a single character that is used to represent a mathematical object, operation, unit.
Examples:
P is a point.
Square root is represented by "√"
A degree is represented by "â—¦"
But it could be multiple characters: ABC is a triangle.
What symbol
a is used as a symbol to represent a variable.
its a shape
it mean have to divide it i think
The word "quad" mean four (4).
A multiple in a nmber
"xi" symbol in maths if used mostly in ven diogrammes and is in the top, right hand corner
An ABCDEFGHI.....
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From the top menu bar: Insert > Symbol (normal text). Scroll down to the Greek alphabet. It's this one: π
Nothing, since decompisition is not a real word! What decomposition means depends on the context, which you have not provided: "maths" is not enough.
The word 'plus' implies the process of addition.