Question about cutting the inner liner (roof)?

[TSRalex]

My work in planning my own yurt is progressing again, but now I am faced with a few puzzles as I consider cutting the inner liner for the roof:

My yurt should have a diameter of 8 meters (= 2513 cm circumference), the outside diameter of the

center ring

is 160 cm.

I thought of cutting strips in a cone shape and sewing them together, but I'm no longer sure whether my way of thinking is correct:

If I use a fabric width of 170 cm (= netto use of 160 cm), I need 16 strips to cover the outside diameter.
See green colored in the drawing.
Above, at the

center ring

, these tracks would only have a width of 10 cm and that makes me doubt the correctness of my considerations.

But if I use the strips as shown in the drawing in the color magenta, the sewing work will be less overall, but a little more difficult with the center ring.

So my question to the specialists here is whether you can tell from your inner liner how it is sewn (or cut)?

Or do you have any suggestions in which way to cut the fabric best?