prime.
* * * * *
WRONG!
They are coprime, not prime.
GCF(8, 9) is 1 but neither 8 nor 9 is a prime.
Mathematicians call them "factor pairs."
There are mathematical concepts that mathematicians call "imaginary numbers" these are a multiple of the square root of minus 1. Infinity is not a real number either.
Pringles
Numbers whose factors only include one and themselves are called Prime numbers.
That number is called "i", the imaginary unit. The name "imaginary" is for historical reasons; these numbers have many practical applications, for example in electricity.
There are infinitely many pairs. 1) Pick a value for one of the numbers - call this A 2) The second number, B = 0.47 - A
Octagonoctagon
A regular octagon
A polynomial.
There is no proof that such pairs exist.
Most mathematicians would call that a 1000-gon. If you want to show off, call it a "chiliagon."
A cuboid would fit the given ------------------- I would call it a "box", but mathematicians might also call it a rectangular box, a rectangular cuboid, a right cuboid, a rectangular hexahedron, a rectangular parallelepiped, or a right rectangular prism.