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  2. Rhombus - Wikipedia

    en.wikipedia.org/wiki/Rhombus

    The rhombus has a square as a special case, and is a special case of a kite and parallelogram. In plane Euclidean geometry , a rhombus ( pl. : rhombi or rhombuses ) is a quadrilateral whose four sides all have the same length.

  3. Parallelogram - Wikipedia

    en.wikipedia.org/wiki/Parallelogram

    RhombusA parallelogram with four sides of equal length. Any parallelogram that is neither a rectangle nor a rhombus was traditionally called a rhomboid but this term is not used in modern mathematics. [1] SquareA parallelogram with four sides of equal length and angles of equal size (right angles).

  4. Square - Wikipedia

    en.wikipedia.org/wiki/Square

    A square can also be defined as a parallelogram with equal diagonals that bisect the angles. If a figure is both a rectangle (right angles) and a rhombus (equal edge lengths), then it is a square. A square has a larger area than any other quadrilateral with the same perimeter. [7]

  5. Rhomboid - Wikipedia

    en.wikipedia.org/wiki/Rhomboid

    Traditionally, in two-dimensional geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are non-right angled.. The terms "rhomboid" and "parallelogram" are often erroneously conflated with each other (i.e, when most people refer to a "parallelogram" they almost always mean a rhomboid, a specific subtype of parallelogram); however, while all rhomboids ...

  6. Orthodiagonal quadrilateral - Wikipedia

    en.wikipedia.org/wiki/Orthodiagonal_quadrilateral

    A rhombus is an orthodiagonal quadrilateral with two pairs of parallel sides (that is, an orthodiagonal quadrilateral that is also a parallelogram). A square is a limiting case of both a kite and a rhombus. Orthodiagonal quadrilaterals that are also equidiagonal quadrilaterals are called midsquare quadrilaterals. [2]

  7. Parallelogon - Wikipedia

    en.wikipedia.org/wiki/Parallelogon

    A four-sided parallelogon is called a parallelogram. ... Rectangle & rhombus: Dih 2, order 4 Square: Dih 4, order 8 6 Elongated parallelogram: Z 2, order 2

  8. 5 Items From the 1970s That Are Worth a Lot of Money - AOL

    www.aol.com/finance/5-items-1970s-worth-lot...

    This would be why it sold for $204,435 at auction. Obi-Wan Kenobi with Double-Telescoping Lightsaber (1977): This is a rare Star Wars toy and sold at an auction for $76,000 in 2018.

  9. Parallelepiped - Wikipedia

    en.wikipedia.org/wiki/Parallelepiped

    In geometry, a parallelepiped is a three-dimensional figure formed by six parallelograms (the term rhomboid is also sometimes used with this meaning). By analogy, it relates to a parallelogram just as a cube relates to a square. [a] Three equivalent definitions of parallelepiped are a hexahedron with three pairs of parallel faces,