Which nation is the most densely populated in the arab world? saudi arabia egypt morocco iran

Egypt

Explanation:

Egypt is the most densely populated country in the Arab World, as well as the third-most populous in the African continent. Most people in Egypt live along the banks of the Nile, particularly in urban areas. In rural areas, most people live along traditional trade and transportation routes. However, many people in Egypt are migrating to urban areas searching for better work opportunities.

an angle + its complement = 90 degrees