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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.
var y1 = Math.sqrt(9);
var y2 = Math.pow(10, 3);
y1 has the value 3 and y2 has the value 1000 (10³ = 10 * 10 * 10 = 1000).

Exercise

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