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  2. Rhombus - Wikipedia

    en.wikipedia.org/wiki/Rhombus

    Using congruent triangles, one can prove that the rhombus is symmetric across each of these diagonals. It follows that any rhombus has the following properties: Opposite angles of a rhombus have equal measure. The two diagonals of a rhombus are perpendicular; that is, a rhombus is an orthodiagonal quadrilateral. Its diagonals bisect opposite ...

  3. Spirit photography - Wikipedia

    en.wikipedia.org/wiki/Spirit_photography

    Spirit photography (also called ghost photography) is a type of photography whose primary goal is to capture images of ghosts and other spiritual entities, especially in ghost hunting. It dates back to the late 19th century.

  4. Kite (geometry) - Wikipedia

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

    Additionally, if a convex kite is not a rhombus, there is a circle outside the kite that is tangent to the extensions of the four sides; therefore, every convex kite that is not a rhombus is an ex-tangential quadrilateral. The convex kites that are not rhombi are exactly the quadrilaterals that are both tangential and ex-tangential. [16]

  5. Rhombicosidodecahedron - Wikipedia

    en.wikipedia.org/wiki/Rhombicosidodecahedron

    Johannes Kepler in Harmonices Mundi (1618) named this polyhedron a rhombicosidodecahedron, being short for truncated icosidodecahedral rhombus, with icosidodecahedral rhombus being his name for a rhombic triacontahedron.

  6. 30 Color Photos Photographers Took 100 Years Ago That Still ...

    www.aol.com/44-old-color-photos-showing...

    By projecting all three images onto a screen simultaneously, he was able to recreate the original image of the ribbon. #4 London, Kodachrome. Image credits: Chalmers Butterfield

  7. Penrose tiling - Wikipedia

    en.wikipedia.org/wiki/Penrose_tiling

    The rhombus tiling was independently discovered by Robert Ammann in 1976. [22] Penrose and John H. Conway investigated the properties of Penrose tilings, and discovered that a substitution property explained their hierarchical nature; their findings were publicized by Martin Gardner in his January 1977 " Mathematical Games " column in ...

  8. 48 actors who completely transformed themselves into real ...

    www.aol.com/48-actors-completely-transformed...

    Macall Polay/Searchlight Pictures. Actors often transform into real-life musicians for biopics. Some actors go through physical transformations to play musicians.

  9. Rectangle - Wikipedia

    en.wikipedia.org/wiki/Rectangle

    rhombus In Euclidean plane geometry , a rectangle is a rectilinear convex polygon or a quadrilateral with four right angles . It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°); or a parallelogram containing a right angle.