Math

Many mathematical functions are grouped together in the Math object. For example, Math.sqrt(x) returns the square root and Math.pow(x, y) calculates x to the power of y.

let y1 = Math.sqrt(9);
let y2 = Math.pow(10, 3);

y1 has the value 3 and y2 has the value 1000 (10³ = 10 * 10 * 10 = 1000).

Write a function hypotenuse that calculates the length of the hypotenuse of a right triangle. The length of the two legs is passed to the function. Tip: In a right triangle the Pythagorean theorem is valid. If a and b are the lengths of the two legs and c is the length of the hypotenuse, the following is true: a² + b² = c². Since 3² + 4² = 5² applies, hypotenuse(3, 4) should return 5.

+ Hint

function hypotenuse(a, b) {
  let cSquare = Math.pow(a, 2) + Math.pow(b, 2);
  return ...
}

+ Solution

function hypotenuse(a, b) {
  let cSquare = Math.pow(a, 2) + Math.pow(b, 2);
  return Math.sqrt(cSquare);
}