Question

c=11.4, a=10.2. find b

Answer 1

Are these sides of a right triangle?

Answer 2

If that's a right triangle, then
a^2 + b^2 = c^2

Answer 3

\[\sqrt{11.4 ^2 -10.2^2}=\sqrt{129.96-104.04}=\sqrt{25.92}≈5.1\]