Title: 10-cube
Content:  In geometry, a 10-cube is a ten-dimensional hypercube. It has 1024 vertices, 5120 edges, 11520 square faces, 15360 cubic cells, 13440 tesseract 4-faces, 8064 5-cube 5-faces, 3360 6-cube 6-faces, 960 7-cube 7-faces, 180 8-cube 8-faces, and 20 9-cube 9-faces. It can be named by its Schläfli symbol {4,38}, being composed of 3 9-cubes around each 8-face. It is sometimes called a dekeract, a portmanteau of tesseract (the 4-cube) and deka- for ten (dimensions) in Greek, It can also be called an icosaxennon or icosa-10-tope as a 10 dimensional polytope, constructed from 20 regular facets. It is a part of an infinite family of polytopes, called hypercubes. The dual of a dekeract can be called a 10-orthoplex or decacross, and is a part of the infinite family of cross-polytopes.
Title: List of mathematical shapes
Content:  kite ; Parallelogram ; Rhombus (equilateral parallelogram) ; Lozenge ; Rhomboid ; Rectangle ; square (regular quadrilateral) ; Tangential quadrilateral ; Trapezoid or trapezium ; Isosceles trapezoid ; Pentagon ; Regular pentagon ; Hexagon ; Lemoine hexagon ; Heptagon ; Octagon ; Regular octagon ; Nonagon ; Decagon ; Regular decagon ; Hendecagon ; Dodecagon ; Triskaidecagon ; Tetradecagon ; Pentadecagon ; Hexadecagon ; Heptadecagon ; Octadecagon ; Enneadecagon ; Icosagon ; Triacontagon ; Tetracontagon ; Pentacontagon ; Hexacontagon ; Heptacontagon ; Octacontagon ; Enneacontagon ; Hectogon ; 257-gon ; Chiliagon ; Myriagon ; 65537-gon ; Megagon ; Apeirogon  Polygons named for their number of sides 
Title: Decagon
Content:  A regular decagon has all sides of equal length and each internal angle will always be equal to 144°. Its Schläfli symbol is {10} and can also be constructed as a truncated pentagon, t{5}, a quasiregular decagon alternating two types of edges.
Title: Decagon
Content:  A regular decagon has 10 sides and is equilateral. It has 35 diagonals
Title: Hendecagon
Content:  In geometry, a hendecagon (also undecagon or endecagon ) or 11-gon is an eleven-sided polygon. (The name hendecagon, from Greek hendeka "eleven" and –gon "corner", is often preferred to the hybrid undecagon, whose first part is formed from Latin undecim "eleven". )
Title: Decagon
Content:  In geometry, a decagon (from the Greek δέκα déka and γωνία gonía, "ten angles") is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is 1440°. A self-intersecting regular decagon is known as a decagram.
Title: List of mathematical shapes
Content: 10-polytope ; 10-cube ; 10-demicube ; 10-orthoplex ; 10-simplex 
Title: Octagon
Content:  In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, "eight angles") is an eight-sided polygon or 8-gon. A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges. A truncated octagon, t{8} is a hexadecagon, {16}. A 3D analog of the octagon can be the rhombicuboctahedron with the triangular faces on it like the replaced edges, if one considers the octagon to be a truncated square.
Title: 10-simplex
Content:  In geometry, a 10-simplex is a self-dual regular 10-polytope. It has 11 vertices, 55 edges, 165 triangle faces, 330 tetrahedral cells, 462 5-cell 4-faces, 462 5-simplex 5-faces, 330 6-simplex 6-faces, 165 7-simplex 7-faces, 55 8-simplex 8-faces, and 11 9-simplex 9-faces. Its dihedral angle is cos−1(1/10), or approximately 84.26°. It can also be called a hendecaxennon, or hendeca-10-tope, as an 11-facetted polytope in 10-dimensions. The name hendecaxennon is derived from hendeca for 11 facets in Greek and -xenn (variation of ennea for nine), having 9-dimensional facets, and -on.
Title: Truncated triakis icosahedron
Content:  The truncated triakis icosahedron, or more precisely an order-10 truncated triakis icosahedron, is a convex polyhedron with 72 faces: 10 sets of 3 pentagons arranged in an icosahedral arrangement, with 12 decagons in the gaps.

Question: what is the name of the shape with 100 sides?
Answer: hectogon.
hecatogon.
hecatontagon.