Hey there Caleb!
To start of, the sentence was clear on that it said . . .

The statement listed above is the (key) point. We need to keep this in mind.
So, now that we know this.
We would use the mathematic (Ф)
So,sense we know that a (hexagon) had it's (6) shapes, we would do
. . .
Ф = 360° : 6 = 60°
Your correct answer to this question would be
. . .

Hope this helps.
~Jurgen
I believe b is about 16.3, hope this helps
The lamp is about 90 cm. to get this answer you take 36 and multiply it by 2.5.
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