Find side b if side a = 10 inches and side c = 16 inches. Round to the nearest hundredth if the answer is uneven

This uses the Pythagorean Theorem, which is a^2 + b^2 = c^2. All you need to do is switch that formula around and you can get the answer easily.

10^2 + b^2 = 16^2

100 + b^2 = 256

b^2 = 156

b = 12.489, or 12.49 rounded