Answer I got 6.6. If there was a attached photo, the answer would change.
Its a rectangular prism that has a unknown length. In order to solve this, you have to solve another triangle. Plus in the photo (which is not included) , the hypotenuse is already provided when you solve the first triangle so the line cg is what is asking for so 6.6² + other line² = the given hypotenuse. I did this equation a bitago so I don't want to rethink about the whole thing again.