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 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).
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.