Answer:
Ancient Chinese: Isolated by Geographic features, ruled by a series of several dynasties, well-planned orderly cities,
Indus Valley: Public Baths used for cleansing... , Public drainage and sewage systems, first civilization to Cultivate rice and millet.
Because they live in two different states at a time so they give you life at once
The circle with diameter of 24 means that 2

r = 24.
Solving for r, we get

r=24.
Dividing both sides by

, we get r=24/

.
The area of the full circle is

times 24 squared over

. The

being multiplied cancels out, meaning that 24 squared over

is the area of the full circle. 24 squared is 576, and dividing by 16 we get

as the answer.