If the base length is x cm, then the waist length is 2x cm.

, so

x

4x=36

X=7.2 cm

2

Suppose the waist length is 8 cm and the bottom length is 36- 16=20 cm.

eight

8 = 16 < 20 (the sum of two sides should be greater than the third side)

So the bottom edge should be 8 cm long, then

Waist circumference is (36-8)/2 = 14cm.