Explanation: Because, the whole thing is 180* and one side is 90* so 180-90=90 And 2x=90 so divide both sides by two, and you’ll get x = 45* Hope this helps!
I believe he dove 6 feet because started 3 feet below water and went down to 9 feet below water and the difference between 9 feet and 3 feet is 6 feet.
