Triangulum is the constellation between Aries the Ram and Andromeda. It's also the name of a spiral galaxy - it's named The Triangulum Galaxy because it's found in the Triangulum Constellation.
Praealticus triangulus was created in 1951.
The names of shapes often derive from Latin or Greek roots, reflecting their characteristics or the mathematicians who studied them. For example, "triangle" comes from the Latin "triangulus," meaning "three angles," while "pentagon" comes from the Greek "pentagonon," meaning "five angles." These names help to categorize shapes based on their properties, such as the number of sides or angles. Additionally, historical contexts and cultural influences also play a role in the terminology used for shapes.
Triangles as a geometric concept have existed since ancient times, with their properties being studied by mathematicians in various cultures, including ancient Egyptians and Greeks. The word "triangle" comes from the Latin "triangulus," meaning "three corners." While the concept of a triangle was understood thousands of years ago, formalizing the study of triangles and their properties, known as trigonometry, developed significantly in Greek mathematics around 300 BCE with figures like Euclid and later Ptolemy.