Norma

Norma (Nor) is a small and inconspicuous constellation in the southern hemisphere between Scorpius and Centaurus. Its name is Latin for normal, referring to a right angle, and is variously considered to represent a rule, a carpenter's square, a set square or a level.

Norma, originally named l’Equerre et la Regle in French, was one of the constellations invented by Abbé de Lacaille (Abbé Nicolas Louis de La Caille, sometimes spelled Lacaille, was a French astronomer) in the middle of the 1750s, when he was measuring about 10,000 stars at the Cape of Good Hope (The Cape of Good Hope is a rocky headland on the Atlantic coast of the Cape Peninsula, South Africa). Norma represents a carpenter's square, used in the Age of Exploration by carpenters on exploratory vessels.

Bordering constellations
Scorpius | Lupus | Circinus | Triangulum Australe | Ara
Wikipedia