1. If the cardinal number is 20, the height under the radical number is 16, and the waist is 16? + 10? =√356

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.