Create a function that takes the length of the side of an equilateral triangle in centimeters and returns the height of the triangle in millimeters.
height(2) ➞ "17.3 mm"
height(5) ➞ "43.3 mm"
height(6.2) ➞ "53.7 mm"Return the answer rounded to one decimal place and in the format shown in the examples above.