Pythagorean theorem Question For Upcoming Grade 9 Academic Math Test?

I have a test coming up and i seem to have forgotten a few of the formulas for it. I know the A^2+B^2=C^2 formula but i need a few others. What would the formula be if the base and the hypotenuse are known? And are their any other formulas that i should be aware of? Please keep in mind that I'm in Grade 9 academic math so i wont need university level formulas. I Appreciate your help.