I am trying to solve a right triangle given the coordinated of two points. This diagram explains the triangle better

We know the coordinates of point A and point C, we also know that the angle of b is 90 degrees. I would like to be able to find all the angles and side lengths. I know we can find the length of the hypotenuse using the distance formula the two known points however I am not sure where to go from here.
Thanks!
$B$ can be any point on the circle with diameter $AC$. Therefore neither angles nor side lengths can be determined. In other words the problem has a solution for any $0<\alpha<\frac\pi2$, and for any $0<a<b$.