hypotenuse (math.) The most basic definition is: let a be some number, n is a positive integer number, an hypotenuse (math.) is expressed as an, representing the Results obtained by n A multiplication, such as 2⁴=2×2×2×2=16. The hypotenuse (math.) definition can also be extended to 0 hypotenuse (math.), negative number hypotenuse (math.), and so on. When importing math formulas on a computer, notation "^" is also often used for hypotenuse (math.) because it is not easy to import calculate the square root. Example 2's 5 hypotenuse (math.) is usually expressed as 2^5.