∆abc rotates 90° clockwise about point p to form ∆a′b′c′.

1."lessen the worth of ."

2."increase the worth of."

3." beyond the worth of."

4."against the worth of ."

20: 5

explanation:

about 20% of the world's population lives in   southwest asia, but on less than 5% of the world's   land area.

chinese civil war took place over a long period of time between 1927 and 1950. the war was interrupted when japan invaded china in 1936 and by world war ii. the war was fought between the nationalist government of china, also called the kuomintang (kmt), and the communist party of china (cpc).