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  2. Shoelace formula - Wikipedia

    en.wikipedia.org/wiki/Shoelace_formula

    Shoelace scheme for determining the area of a polygon with point coordinates (,),..., (,). The shoelace formula, also known as Gauss's area formula and the surveyor's formula, [1] is a mathematical algorithm to determine the area of a simple polygon whose vertices are described by their Cartesian coordinates in the plane. [2]

  3. Degree (temperature) - Wikipedia

    en.wikipedia.org/wiki/Degree_(temperature)

    The "degree Kelvin" (°K) is a former name and symbol for the SI unit of temperature on the thermodynamic (absolute) temperature scale. [1] Since 1967, it has been known simply as the kelvin, with symbol K (without a degree symbol).

  4. Exterior angle theorem - Wikipedia

    en.wikipedia.org/wiki/Exterior_angle_theorem

    The exterior angle theorem is Proposition 1.16 in Euclid's Elements, which states that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles.

  5. Triangle of Life - Wikipedia

    en.wikipedia.org/wiki/Triangle_of_Life

    The Triangle of Life does not address the common instance of furniture toppling over during an earthquake. Copp's idea is focused on situations when a building completely collapses, falling straight down, rather than the far more common situations, when side-to-side shaking causes falling objects (such as trees, chimneys, furniture, and objects on shelves) to land on top of people.