I have a geometry related question?

Okay so there is a ferris wheel something like that and you measure the distance between you and that bolder it is 250 ft. And you get that if you make a triangle with the points being you the top of the ferris and the bottom that from your point there is a 51 degree angle how do you find the height of the ferris wheel. Please explain how you solved this so ill know how to do this later on.