If the squares have sides whose length is 6 inches, what is the total area (in square inches) of the glass used to make the lamp?

An octagonal lamp has 8 square glass sides. The total area of the glass used for the lamp is given by the formula g = 8×2, where g is the area of the glass and x is the length of one side of the squares.

If the squares have sides whose length is 6 inches, what is the total area (in square inches) of the glass used to make the lamp?
A . 2340
B . 288
C . 96
D . 48
E . 8

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Answer: B