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  2. Prism (geometry) - Wikipedia

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

    The surface area of a right prism is: +, ... A frustum is a similar construction to a prism, with trapezoid lateral faces and differently sized top and bottom polygons.

  3. Herschel wedge - Wikipedia

    en.wikipedia.org/wiki/Herschel_Wedge

    The prism in a Herschel wedge has a trapezoidal cross section. The surface of the prism facing the light acts as a standard diagonal mirror, reflecting a small portion of the incoming light at 90 degrees into the eyepiece. The trapezoidal prism shape refracts the remainder of the light gathered by the telescope's objective away at an angle. The ...

  4. Frustum - Wikipedia

    en.wikipedia.org/wiki/Frustum

    2.2 Surface area. 3 Examples. 4 See also. 5 Notes. ... the base faces are polygonal and the side faces are trapezoidal. ... then a frustum becomes a prism ...

  5. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    Trapezoid + and are the bases Sources: [1] [2] [3] ... is the base's area and is the prism's height; Pyramid – , where is the base's area ... Surface area: = ...

  6. Trapezoid - Wikipedia

    en.wikipedia.org/wiki/Trapezoid

    A right trapezoid (also called right-angled trapezoid) has two adjacent right angles. [13] Right trapezoids are used in the trapezoidal rule for estimating areas under a curve. An acute trapezoid has two adjacent acute angles on its longer base edge. An obtuse trapezoid on the other hand has one acute and one obtuse angle on each base.

  7. Cowboys owner Jerry Jones lobbies for NFL Christmas Day games ...

    www.aol.com/cowboys-owner-jerry-jones-lobbies...

    No NHL games are scheduled for Wednesday.. Netflix also bought the rights to stream at least one holiday game in 2025 and 2026, according to the terms of the multiyear deal with the league.

  8. Surface area - Wikipedia

    en.wikipedia.org/wiki/Surface_area

    A sphere of radius r has surface area 4πr 2.. The surface area (symbol A) of a solid object is a measure of the total area that the surface of the object occupies. [1] The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra (i.e., objects with ...

  9. Northern lights to ring in 2025? Look to the skies in these ...

    www.aol.com/news/northern-lights-ring-2025-look...

    When will the geomagnetic storm occur? A storm watch is in effect for Dec. 31. CMEs travel several million miles per hour, so the NOAA predicts that the best time to see the lights would be ...