Question

Find the value of x. ​

Answer 1

1. 12^2 + b^2 =20^2
144 + b^2 =400
b^2=256
b=16
so the answer to first question is x=16

2. 9^2 + 13^2 =x^2
81 + 169=x^2
250= x^2
x = 5 radial 10