1. A square is inscribed in a circle such that each corner touches the circle.
A. Find a function that gives the area of the square as a function of the radius of the circle. Simplify the function as much as possible, and describe any symmetry in the function. Make certain to show all the steps you use to come up with the function, as well as describe your reasoning.
B. State the domain and range of the function you came up with in part (A), keeping in mind all practical considerations.