Am I doing the right steps for this?

The question is: solve each triangle as described.

c= 9.5 b= 3.7

Do i do the pygahthom therom [sry spelln] first or can i just go ahead and fing the sides by doing 90 - one of the sides?

I just did 9.5^2 - 3.7^2 = 669.89

What do I do now??