Alright and next on my list of things to do today is torture anyone who is stupid enough to visit this pathetic piece of crap i call a website. So here is an exerpt from page 399 of my trigonometry textbook:

"...a dilation could be used to transform a given right triangle inot a similar right triangle in the unit circle. The hypotenuse of the right triangle in the unit circle has a length of 1 because the radius of the circle has a length of 1.

We can also use a dilation to transform a right triangle in the unit circle into a similar right triangle whose hypotenuse does not have a length of 1. Just as the lengths of sides of a right triangle in the unit circle are treated as directed distances, so too are the lengths of sides in the newly formed similar triangle treated as directed distances in a coordinate plane."