The length of the fence is 2√356+20.
2. If waist circumference is 20 and height 16, the following is:
20 under the root sign? - 16? = 12
32 under the root sign? + 16? ≈√ 1280
So the bottom is √ 1280.
The length of the fence is 40+√ 1280.
I wish you progress in your study.