Use boundary and region in two sentences about ways of organizing the western hemisphere

In geographic and fashioning, the hemispheres of Earth talk over with any division of the world into 2 hemispheres. the foremost common such divisions square measure by angular distance or longitudinal markers:  

North–South

Northern Hemisphere,  

East–West

Eastern Hemisphere, the 0.5 that lies east of the line of longitude and west of the a hundred and eightieth meridian

Western Hemisphere, the 0.5 that lies west of the line of longitude and east of the a hundred and eightieth meridian.

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.