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  2. Parallelepiped - Wikipedia

    en.wikipedia.org/wiki/Parallelepiped

    A perfect parallelepiped is a parallelepiped with integer-length edges, face diagonals, and space diagonals. In 2009, dozens of perfect parallelepipeds were shown to exist, [ 3 ] answering an open question of Richard Guy .

  3. List of formulas in elementary geometry - Wikipedia

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

    This is a list of volume formulas of basic shapes: [4]: 405–406 ... Parallelepiped – , where , , and are the ...

  4. Triple product - Wikipedia

    en.wikipedia.org/wiki/Triple_product

    The three vectors spanning a parallelepiped have triple product equal to its volume. (However, beware that the direction of the arrows in this diagram are incorrect.) In exterior algebra and geometric algebra the exterior product of two vectors is a bivector , while the exterior product of three vectors is a trivector .

  5. Tetrahedron - Wikipedia

    en.wikipedia.org/wiki/Tetrahedron

    Comparing this formula with that used to compute the volume of a parallelepiped, we conclude that the volume of a tetrahedron is equal to ⁠ 1 / 6 ⁠ of the volume of any parallelepiped that shares three converging edges with it. The absolute value of the scalar triple product can be represented as the following absolute values of determinants:

  6. Volume element - Wikipedia

    en.wikipedia.org/wiki/Volume_element

    Consider the linear subspace of the n-dimensional Euclidean space R n that is spanned by a collection of linearly independent vectors , …,. To find the volume element of the subspace, it is useful to know the fact from linear algebra that the volume of the parallelepiped spanned by the is the square root of the determinant of the Gramian matrix of the : (), = ….

  7. 2-Year-Old Died After Dad Allegedly Isolated Him in Room Near ...

    www.aol.com/2-old-died-dad-allegedly-193803745.html

    A North Carolina father is facing criminal charges after authorities allege he left his child isolated in a room with a space heater for more than 12 hours, leading to his death.

  8. FBI issues warning amid drone mystery: Don’t point lasers at ...

    www.aol.com/fbi-issues-warning-amid-drone...

    Amid growing anxieties surrounding reported drone sightings, the FBI has issued a warning against a new trend of pointing lasers at aircrafts.

  9. Rectangular cuboid - Wikipedia

    en.wikipedia.org/wiki/Rectangular_cuboid

    This shape is also called rectangular parallelepiped or orthogonal parallelepiped. [a] Properties ... its volume is the product of the rectangular area and its height