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  2. Cricket pitch - Wikipedia

    en.wikipedia.org/wiki/Cricket_pitch

    A cricket pitch consists of the central strip of a cricket field between the two wickets. It is 22 yd (20.12 m) long (1 chain) and 10 ft (3.05 m) wide. [1] The surface is flat and is normally covered with extremely short grass, but can be completely dry or dusty soil with barely any grass or, in some circumstances (that are rarely seen in high ...

  3. Tennis court - Wikipedia

    en.wikipedia.org/wiki/Tennis_court

    The dimensions of a tennis court are defined and regulated by the International Tennis Federation (ITF) governing body and are written down in the annual 'Rules of Tennis' document. [1] The court is 78 ft (23.77 m) long. Its width is 27 ft (8.23 m) for singles matches and 36 ft (10.97 m) for doubles matches. [2]

  4. Sierpiński carpet - Wikipedia

    en.wikipedia.org/wiki/Sierpiński_carpet

    6 steps of a Sierpiński carpet. The Sierpiński carpet is a plane fractal first described by Wacław Sierpiński in 1916. The carpet is a generalization of the Cantor set to two dimensions; another such generalization is the Cantor dust. The technique of subdividing a shape into smaller copies of itself, removing one or more copies, and ...

  5. Area - Wikipedia

    en.wikipedia.org/wiki/Area

    Area is the measure of a region 's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to ...

  6. Square - Wikipedia

    en.wikipedia.org/wiki/Square

    The square is in two families of polytopes in two dimensions: hypercube and the cross-polytope. The Schläfli symbol for the square is {4}. The square is a highly symmetric object. There are four lines of reflectional symmetry and it has rotational symmetry of order 4 (through 90°, 180° and 270°). Its symmetry group is the dihedral group D 4.

  7. Heron's formula - Wikipedia

    en.wikipedia.org/wiki/Heron's_formula

    Mathematical historian Thomas Heath suggested that Archimedes knew the formula over two centuries earlier, [4] and since Metrica is a collection of the mathematical knowledge available in the ancient world, it is possible that the formula predates the reference given in that work. [5] A formula equivalent to Heron's, namely,

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Dynamic rectangle - Wikipedia

    en.wikipedia.org/wiki/Dynamic_rectangle

    A dynamic rectangle is a right-angled, four-sided figure (a rectangle) with dynamic symmetry which, in this case, means that aspect ratio (width divided by height) is a distinguished value in dynamic symmetry, a proportioning system and natural design methodology described in Jay Hambidge 's books. These dynamic rectangles begin with a square ...

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