The word "dodecagon" is spelled with the letters d-o-d-e-c-a-g-o-n. Its pronunciation is dəʊ.dɛ.kə.ɡɒn. The first syllable "dode-" is pronounced with a short "o" sound, like "pot". The second syllable "-ca-" is pronounced with a "k" sound followed by a short "a" sound, like "cat". The final syllable "-gon" is pronounced with a long "o" sound, like "cone". A dodecagon is a 12-sided geometric shape, often used in mathematics and geometry.
A dodecagon is a geometric figure or polygon that possesses twelve sides and twelve angles. It is formed by connecting twelve straight-line segments or edges in such a way that each segment intersects with two others, resulting in a closed shape. The term "dodecagon" is derived from the Greek words "dodeka," meaning "twelve," and "gonia," meaning "corner" or "angle."
Since a dodecagon possesses twelve sides, it also has twelve corresponding vertices, which are the points where two adjacent sides intersect. The interior angles of a dodecagon measure a total of 1,800 degrees, with each angle measuring 150 degrees. The sum of the angles in any polygon is determined by the formula (n-2) x 180 degrees, where n represents the number of sides in the polygon.
Dodecagons can also be classified as convex or concave depending on their shape. A convex dodecagon has all of its interior angles measuring less than 180 degrees and all the lines connecting any two points on the figure lying entirely inside it. Conversely, a concave dodecagon possesses at least one interior angle greater than 180 degrees, and there exists at least one line that connects two points on the figure that lies outside the shape.
The study of dodecagons, along with polygons in general, falls under the field of geometry, which explores the properties and relationships of various shapes and figures.
A regular figure having twelve equal sides and angles.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word dodecagon is derived from two Greek words: dodeka, meaning twelve, and gonia, meaning angle or corner. Combining these two words gives us dodekagonia, which eventually led to the modern English term dodecagon.