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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°. Regular decagon
In mathematics, 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 not rotationally symmetrical.
A pentagon is a five-sided polygon. A regular pentagon has 5 equal edges and 5 equal angles. In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain.
decagon: 10 [21] hendecagon (or undecagon) 11 [21] The simplest polygon such that the regular form cannot be constructed with compass, straightedge, and angle trisector. However, it can be constructed with neusis. [22] dodecagon (or duodecagon) 12 [21] tridecagon (or triskaidecagon) 13 [21] tetradecagon (or tetrakaidecagon) 14 [21] pentadecagon ...
Each angle of a regular hexadecagon is 157.5 degrees, and the total angle measure of any hexadecagon is 2520 degrees.. The area of a regular hexadecagon with edge length t is
A regular triangle, decagon, and pentadecagon can completely fill a plane vertex. However, due to the triangle's odd number of sides, the figures cannot alternate around the triangle, so the vertex cannot produce a semiregular tiling .
SAN FRANCISCO (Reuters) - - Decagon, a startup that sells artificial intelligence-powered customer support solutions, said on Tuesday it had raised $35 million in Series A and seed funding. Accel ...
In geometry, a decahedron is a polyhedron with ten faces.There are 32300 topologically distinct decahedra, [1] [2] and none are regular, so this name does not identify a specific type of polyhedron except for the number of faces.