Heptagon

Part of speech: noun

Pronunciation: /ˈhɛp.tə.ɡɒn/

Definitions

1. A seven-sided polygon with angles that sum up to 900 degrees is known as a geometric figure
2. A polygon characterized by seven sides and seven internal angles describes this specific geometric form
3. A geometric shape featuring seven edges and a total of seven internal angles is referred to as a seven-sided polygon

Etymology: The heptagon is one of the plainer words in geometry, built entirely from Greek parts that tell you what it is. Its first half, "hepta-", comes from "heptá", meaning seven, the same root that appears in "heptathlon" and "heptad". The second half, "-gon", comes from "gōnía", meaning angle, which also gave English "polygon" and "pentagon". Put together, the name simply means a shape with seven angles. Ancient Greek mathematicians worked with the word "heptagōnon" in this sense, and English borrowed the term from that Greek source, with records dating from the 16th century. The word entered English as a learned coinage drawn straight from classical Greek, not through French or Latin, which is typical of mathematical vocabulary from that period.

Synonyms: seven-sided polygon