Decagon - Wikipedia
In geometry, a decagon (from the Greek δέκα déka and γωνία gonía, "ten angles") is a ten-sided polygon or 10-gon. [1] . The total sum of the interior angles of a simple decagon is 1440°. A regular decagon has all sides of equal length and each internal angle will …
Decagonal number - Wikipedia
A decagonal number is a figurate number that extends the concept of triangular and square numbers to the decagon (a ten-sided polygon). However, unlike the triangular and square numbers, the patterns involved in the construction of decagonal numbers are …
Decagonal Number -- from Wolfram MathWorld
1 天前 · decagonal number basic definition of prime number; cos(x) + 1/2 cos(2x) + 1/4 cos(4x)
Decagon Explored – Definition, Properties, and Examples
2023年5月25日 · Decagons, with their intriguing shape and symmetrical properties, have captivated mathematicians, artists, and architects for centuries. The Greek terms “deka,” which means “ten,” and “gonia,” which means “angle,” a Decagon is a …
What is a Decagon? Definition, Shape, Sides, Formula, Examples
In geometry, a polygon having ten sides or a ten-sided polygon is called a decagon or ten-gon. It also has ten vertices and ten angles. In the above image, there are 10 sides: AB, BC, CD, DE, EF, FG, GH, HI, IJ, and AJ. There are 10 angles. Decagon interior angles: ∠ ABC, ∠ BCD, ∠ CDE, ∠ DEF, ∠ EFG, ∠ FGH, ∠ GHI, ∠ HIJ, ∠ IJA, and ∠ JAB.
Decagon- Shape, Definition, Formula, Examples - Cuemath
In geometry, a decagon is known as a ten-sided polygon or ten-gon. The sum of the interior angles of a simple decagon is 1440° and the sum of the exterior angles of a decagon is 360°. A decagon is a ten-sided polygon with ten vertices and ten angles.
Decagon - Simple English Wikipedia, the free encyclopedia
All sides of a regular decagon are the same length. Each corner is 144°. All corners added together equal 1440°. The amount of space a regular decagon takes up is. = {\displaystyle {\text {Area}}= {\frac {5} {2}}a^ {2} {\sqrt {5+2 {\sqrt {5}}}}.} a is the length of one of its sides.