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  2. Spherical sector - Wikipedia

    en.wikipedia.org/wiki/Spherical_sector

    Intersection of a sphere and cone emanating from its center. A spherical sector (blue) A spherical sector. In geometry, a spherical sector, [1] also known as a spherical cone, [2] is a portion of a sphere or of a ball defined by a conical boundary with apex at the center of the sphere. It can be described as the union of a spherical cap and the ...

  3. Basketball (ball) - Wikipedia

    en.wikipedia.org/wiki/Basketball_(ball)

    A basketball is a spherical ball used in basketball games. Basketballs usually range in size from very small promotional items that are only a few inches (some centimeters) in diameter to extra large balls nearly 2 feet (60 cm) in diameter used in training exercises. For example, a youth basketball could be 27 inches (69 cm) in circumference ...

  4. Spherical cap - Wikipedia

    en.wikipedia.org/wiki/Spherical_cap

    Spherical cap. An example of a spherical cap in blue (and another in red) In geometry, a spherical cap or spherical dome is a portion of a sphere or of a ball cut off by a plane. It is also a spherical segment of one base, i.e., bounded by a single plane.

  5. Truncated icosahedron - Wikipedia

    en.wikipedia.org/wiki/Truncated_icosahedron

    The truncated icosahedron is an Archimedean solid, meaning it is a highly symmetric and semi-regular polyhedron, and two or more different regular polygonal faces meet in a vertex. [5] It has the same symmetry as the regular icosahedron, the icosahedral symmetry, and it also has the property of vertex-transitivity. [6][7] The polygonal faces ...

  6. Conic section - Wikipedia

    en.wikipedia.org/wiki/Conic_section

    A conic section, conic or a quadratic curve is a curve obtained from a cone's surface intersecting a plane. The three types of conic section are the hyperbola, the parabola, and the ellipse; the circle is a special case of the ellipse, though it was sometimes called as a fourth type.

  7. Spherical conic - Wikipedia

    en.wikipedia.org/wiki/Spherical_conic

    In mathematics, a spherical conic or sphero-conic is a curve on the sphere, the intersection of the sphere with a concentric elliptic cone. It is the spherical analog of a conic section (ellipse, parabola, or hyperbola) in the plane, and as in the planar case, a spherical conic can be defined as the locus of points the sum or difference of ...

  8. Hypercone - Wikipedia

    en.wikipedia.org/wiki/Hypercone

    In geometry, a hypercone (or spherical cone) is the figure in the 4-dimensional Euclidean space represented by the equation. It is a quadric surface, and is one of the possible 3- manifolds which are 4-dimensional equivalents of the conical surface in 3 dimensions. It is also named "spherical cone" because its intersections with hyperplanes ...

  9. Triangle offense - Wikipedia

    en.wikipedia.org/wiki/Triangle_offense

    The triangle offense is an offensive strategy used in basketball. Its basic ideas were initially established by Hall of Fame coach Sam Barry at the University of Southern California. [1] His system was further developed by former Houston Rockets and Kansas State University basketball head coach Tex Winter, who played for Barry in the late 1940s ...