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  2. Polygon - Wikipedia

    en.wikipedia.org/wiki/Polygon

    A simple polygon is the boundary of a region of the plane that is called a solid polygon. The interior of a solid polygon is its body, also known as a polygonal region or polygonal area. In contexts where one is concerned only with simple and solid polygons, a polygon may refer only to a simple polygon or to a solid polygon.

  3. Heptagon - Wikipedia

    en.wikipedia.org/wiki/Heptagon

    In geometry, a heptagon or septagon is a seven-sided polygon or 7-gon.. The heptagon is sometimes referred to as the septagon, using "sept-" (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix "-agon" meaning angle.

  4. List of two-dimensional geometric shapes - Wikipedia

    en.wikipedia.org/wiki/List_of_two-dimensional...

    Star polygon – there are multiple types of stars Pentagram - star polygon with 5 sides; Hexagram – star polygon with 6 sides Star of David (example) Heptagram – star polygon with 7 sides; Octagram – star polygon with 8 sides Star of Lakshmi (example) Enneagram - star polygon with 9 sides; Decagram - star polygon with 10 sides

  5. List of polygons - Wikipedia

    en.wikipedia.org/wiki/List_of_polygons

    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. These segments are called its edges or sides, and the points where two of the edges meet are the polygon's vertices (singular: vertex) or corners.

  6. Base (geometry) - Wikipedia

    en.wikipedia.org/wiki/Base_(geometry)

    A skeletal pyramid with its base highlighted. In geometry, a base is a side of a polygon or a face of a polyhedron, particularly one oriented perpendicular to the direction in which height is measured, or on what is considered to be the "bottom" of the figure. [1]

  7. Hexagon - Wikipedia

    en.wikipedia.org/wiki/Hexagon

    It follows from the ratio of circumradius to inradius that the height-to-width ratio of a regular hexagon is 1:1.1547005; that is, a hexagon with a long diagonal of 1.0000000 will have a distance of 0.8660254 or cos(30°) between parallel sides.

  8. Simple polygon - Wikipedia

    en.wikipedia.org/wiki/Simple_polygon

    A triangulated polygon with 11 vertices: 11 sides and 8 diagonals form 9 triangles. Every simple polygon can be partitioned into non-overlapping triangles by a subset of its diagonals. When the polygon has sides, this produces triangles, separated by diagonals.

  9. Pentagon - Wikipedia

    en.wikipedia.org/wiki/Pentagon

    For the pentagon, this results in a polygon whose angles are all (360 − 108) / 2 = 126°. To find the number of sides this polygon has, the result is 360 / (180 − 126) = 6 2 ⁄ 3, which is not a whole number. Therefore, a pentagon cannot appear in any tiling made by regular polygons.