On the flag of Angola, the symbol with a half circle shape is part of three symbols, collectively chosen to relate to the flag of what former county?
The Angolan flag is a horizontal bicolor of red and black with a yellow emblem in the center. The emblem consists of a five pointed-star within a half gear wheel crossed by a machete (resembling the hammer and sickle used in Soviet iconography). As outlined in the Constitution of Angola, the red half of the flag signifies bloodshed during Angola’s independence struggle, and the black half symbolizes Africa. In the central emblem, the gear represents industrial workers, the machete represents peasantry and the star symbolizes socialism. The flag is most recently described and explained in article 162 of the Constitutional Law of the Republic of Angola (Constitution) of August 25, 1992.
The national flag of Angola came into use at when Angola gained independence on November 11, 1975. It is split horizontally into an upper red half and a lower black half with an Emblem itself resting at the center. It features a yellow half gear wheel crossed by a machete and crowned with a star.