Now you can use the known side ratios of 45-45-90 and 30-60-90 triangles to get all the
lengths you need. If the hypotenuse of a 30-60-90 is 3, then the shorter leg is and the
longer leg is :
Now that you know one of the legs of the 45-45-90, you know the length of the other leg.
Now you have the base and the height. The base is , and the height is . Thus,