Since were Pythagorean theorem, you would have to do a2 + b2 = c2 then when you find c2, you divide it by the power of 2.
With this case, a2 would be 9 since 3 by the power of 2 is 9.. B2 would be 49 since 7 by the power of 2 would be 49 With these two numbers, we get 58.
With 58, you divide it by 2. After this, you would get c ≈ 7.62
