C because 6 times 8 is 48 which is greater than 42
The 3 inside angles need to equal 180.
Subtract E from 180 to find the sum of the other two angles:
180 - 104 = 76
Now because EF ≅ DE , angle D and F would be the same so divide 76 by 2
Angle D = 38
Area of circle = πr2 = π(23)^2
You divide 162 and it equals to 81
We know that:

Then:

Therefore:

Simplifying the above result we get:

Answer: