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  2. How to Draw a Perfect Circle - Wikipedia

    en.wikipedia.org/wiki/How_to_Draw_a_Perfect_Circle

    French. Portuguese. How to Draw a Perfect Circle (Portuguese: Como Desenhar um Círculo Perfeito) is a 2009 Portuguese drama film directed by Marco Martins and starring Rafael Morais, Daniel Duval, Joana de Verona, Beatriz Batarda, and Albano Jeronimo. Its plot revolves around a young man named Guilherme and his sister Sofia who grow up sharing ...

  3. Alexander Overwijk - Wikipedia

    en.wikipedia.org/wiki/Alexander_Overwijk

    To further his claim, he would hand-draw a circle on the blackboard. In 2007, a video of Overwijk drawing a near-perfect circle for his class went viral on YouTube. [5] [6] Although the original story was a fabrication, he hosted a real "World Freehand Circle Drawing Championship" as a fundraiser for the Canadian Cancer Society following his ...

  4. Compass (drawing tool) - Wikipedia

    en.wikipedia.org/wiki/Compass_(drawing_tool)

    Compass (drawing tool) A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, it can also be used as a tool to mark out distances, in particular, on maps. Compasses can be used for mathematics, drafting, navigation and other purposes.

  5. Giotto - Wikipedia

    en.wikipedia.org/wiki/Giotto

    One of the Legend of St. Francis frescoes at Assisi, the authorship of which is disputed. Tradition says that Giotto was born in a farmhouse, perhaps at Colle di Romagnano or Romignano. [11] Since 1850, a tower house in nearby Colle Vespignano has borne a plaque claiming the honor of his birthplace, an assertion that is commercially publicized.

  6. Straightedge and compass construction - Wikipedia

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

    It can only be used to draw a line segment between two points, or to extend an existing line segment. The compass can have an arbitrarily large radius with no markings on it (unlike certain real-world compasses). Circles and circular arcs can be drawn starting from two given points: the centre and a point on the circle. The compass may or may ...

  7. Vitruvian Man - Wikipedia

    en.wikipedia.org/wiki/Vitruvian_Man

    Gallerie dell'Accademia, Venice. The Vitruvian Man (Italian: L'uomo vitruviano; [ˈlwɔːmo vitruˈvjaːno]) is a drawing by the Italian Renaissance artist and scientist Leonardo da Vinci, dated to c. 1490. Inspired by the writings of the ancient Roman architect Vitruvius, the drawing depicts a nude man in two superimposed positions with his ...

  8. Squaring the circle - Wikipedia

    en.wikipedia.org/wiki/Squaring_the_circle

    e. Squaring the circle is a problem in geometry first proposed in Greek mathematics. It is the challenge of constructing a square with the area of a given circle by using only a finite number of steps with a compass and straightedge. The difficulty of the problem raised the question of whether specified axioms of Euclidean geometry concerning ...

  9. Circle - Wikipedia

    en.wikipedia.org/wiki/Circle

    C = 2πR. A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius. The length of a line segment connecting two points on the circle and passing through the centre is called the diameter.