Math.sqrt()

function calcHypotenuse(a, b) {
  return Math.sqrt(a * a + b * b);
}
console.log(calcHypotenuse(3, 4));
// Expected output: 5
console.log(calcHypotenuse(5, 12));
// Expected output: 13
console.log(calcHypotenuse(0, 0));
// Expected output: 0

Math.sqrt(x)

Math.sqrt(-1); // NaN
Math.sqrt(-0); // -0
Math.sqrt(0); // 0
Math.sqrt(1); // 1
Math.sqrt(2); // 1.414213562373095
Math.sqrt(9); // 3
Math.sqrt(Infinity); // Infinity