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  2. Sal Khan - Wikipedia

    en.wikipedia.org/wiki/Sal_Khan

    3. Relatives. Abdul Wahab Khan (grandfather) Salman " Sal " Amin Khan (born October 11, 1976) is an American educator and the founder of Khan Academy, a free online non-profit educational platform with which he has produced over 6,500 video lessons teaching a wide spectrum of academic subjects, originally focusing on mathematics and science. [1]

  3. Khan Academy - Wikipedia

    en.wikipedia.org/wiki/Khan_Academy

    Last updated: May 6, 2024. Khan Academy is an American non-profit [ 3 ] educational organization created in 2006 by Sal Khan. [ 1 ] Its goal is to create a set of online tools that help educate students. [ 4 ] The organization produces short video lessons. [ 5 ]

  4. List of polygons - Wikipedia

    en.wikipedia.org/wiki/List_of_polygons

    List of polygons. Appearance. A pentagon is a five-sided polygon. A regular pentagon has 5 equal edges and 5 equal angles. In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain. These segments are called its edges or sides, and the points where ...

  5. 3Blue1Brown - Wikipedia

    en.wikipedia.org/wiki/3Blue1Brown

    2018 [4] [5] Last updated: May 6, 2024. 3Blue1Brown is a math YouTube channel created and run by Grant Sanderson. [6] The channel focuses on teaching higher mathematics from a visual perspective, and on the process of discovery and inquiry-based learning in mathematics, which Sanderson calls "inventing math". [7]

  6. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    Geometry. In geometry, straightedge-and-compass construction – also known as ruler-and-compass construction, Euclidean construction, or classical construction – is the construction of lengths, angles, and other geometric figures using only an idealized ruler and a pair of compasses. The idealized ruler, known as a straightedge, is assumed ...

  7. Midpoint polygon - Wikipedia

    en.wikipedia.org/wiki/Midpoint_polygon

    Midpoint polygon. In geometry, the midpoint polygon of a polygon P is the polygon whose vertices are the midpoints of the edges of P. [ 1][ 2] It is sometimes called the Kasner polygon after Edward Kasner, who termed it the inscribed polygon "for brevity". [ 3][ 4] The medial triangle. The Varignon parallelogram.

  8. Polygram (geometry) - Wikipedia

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

    Polygram (geometry) Regular polygrams {n / d}, with red lines showing constant d, and blue lines showing compound sequences k {n / d} In geometry, a generalized polygon can be called a polygram, and named specifically by its number of sides. All polygons are polygrams, but they can also include disconnected sets of edges, called a compound polygon.

  9. Geometry - Wikipedia

    en.wikipedia.org/wiki/Geometry

    Mathematics. Geometry (from Ancient Greek γεωμετρία (geōmetría) 'land measurement'; from γῆ (gê) 'earth, land' and μέτρον (métron) 'a measure') [1] is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. [2] Geometry is, along with arithmetic, one ...