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  2. Rectangle - Wikipedia

    en.wikipedia.org/wiki/Rectangle

    Coxeter–Dynkin diagrams: Symmetry group: Dihedral (D 2), [2 ... The formula for the perimeter of a rectangle The area of a rectangle is the product of the length ...

  3. File:Illustration for the area of a rectangle.svg - Wikipedia

    en.wikipedia.org/wiki/File:Illustration_for_the...

    English: Illustration for the area of a rectangle. Deutsch: Der Flächeninhalt eines Rechtecks ist gleich dem Produkt der Seitenlängen. Date: 20 May 2018: Source:

  4. Area - Wikipedia

    en.wikipedia.org/wiki/Area

    A = lw (rectangle). That is, the area of the rectangle is the length multiplied by the width. As a special case, as l = w in the case of a square, the area of a square with side length s is given by the formula: [1] [2] A = s 2 (square). The formula for the area of a rectangle follows directly from the basic properties of area, and is sometimes ...

  5. File:Moment of area of a rectangle through the base.svg

    en.wikipedia.org/wiki/File:Moment_of_area_of_a...

    This SVG diagram uses the path text method. This SVG diagram shows a very simple image. Drawing uncomplicated graphics with a text editor seems more adequate than using a vector graphics program, and will often result in a dramatic reduction of file size.

  6. Regular polygon - Wikipedia

    en.wikipedia.org/wiki/Regular_polygon

    Regular pentagon (n = 5) with side s, circumradius R and apothem a Graphs of side, s; apothem, a; and area, A of regular polygons of n sides and circumradius 1, with the base, b of a rectangle with the same area. The green line shows the case n = 6.

  7. Pythagorean theorem - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_theorem

    The large square is divided into a left and right rectangle. A triangle is constructed that has half the area of the left rectangle. Then another triangle is constructed that has half the area of the square on the left-most side. These two triangles are shown to be congruent, proving this square has the same area as the left rectangle. This ...

  8. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    A true 13×5 triangle cannot be created from the given component parts. The four figures (the yellow, red, blue and green shapes) total 32 units of area. The apparent triangles formed from the figures are 13 units wide and 5 units tall, so it appears that the area should be S = ⁠ 13×5 / 2 ⁠ = 32.5 units.

  9. Egyptian geometry - Wikipedia

    en.wikipedia.org/wiki/Egyptian_geometry

    A Third Dynasty diagram shows how to construct a circular vault using body measures along an arc. If the area of the Square is 434 units. The area of the circle is 433.7. The ostracon depicting this diagram was found near the Step Pyramid of Saqqara. A curve is divided into five sections and the height of the curve is given in cubits, palms ...