what is the shape of a crescent moon
Crescent The crescent shape consists of a circular disk with a segment of another circle removed from its edge, so that what remains is a shape enclosed by two circular arcs of different diameters which intersect at two points (usually in such a manner that the enclosed shape does not include the center of the original circle). As such, it belongs to the class of figures known as lune in planar geometry. The tapering towards the points of intersection of the two arcs are known as the "horns" of the crescent. The classical crescent shape has its horns pointing upward (and is often worn as horns when worn as a crown or diadem, e.g. in depictions of the lunar goddess, or in the headdress of Persian kings, etc.[7]
Star and crescent In the later 20th century, the star and crescent have acquired a popular interpretation as a "symbol of Islam",[3] occasionally embraced by Arab nationalism or Islamism in the 1970s to 1980s, but often rejected as erroneous or unfounded by Muslim commentators in more recent times.[4]
Blue moon Owing to the rarity of a blue moon, the term "blue moon" is used colloquially to mean a rare event, as in the phrase "once in a blue moon".[4][5]
Paris Peace Accords