Are board feet and linear feet answers the same?

No they are differant units of measurement. Board feet, is actually a measurement of volume. 1 board foot is the volume of a board 12" wide by 1" thick by 1 foot long. So to calculate board foot you would also need to know the thickness. Whereas linear feet is a measurement of length, equal to 12 inches, in this case. You can also have linear inches, yards, furlongs, etc.