Poly is Latin for many.
It means 'many'
poly (polynomial) means many uni (unidirectional) means one
principal(in terms of math)- the amount you borrow or deposit
HL in math mean hypotenuse leg
ask your math teacher
It
A polynomial is an expression with many different terms whereas a monomial has only one term. There are other poly- word like polygon or polyhedron but their mono- counterparts do not exist.
sum means the answer of a math problem
No.
neither
A rhombus.