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  2. Perimeter - Wikipedia

    en.wikipedia.org/wiki/Perimeter

    For example, the perimeter of a rectangle of width 0.001 and length 1000 is slightly above 2000, while the perimeter of a rectangle of width 0.5 and length 2 is 5. Both areas are equal to 1. Proclus (5th century) reported that Greek peasants "fairly" parted fields relying on their perimeters. [ 2 ]

  3. Square - Wikipedia

    en.wikipedia.org/wiki/Square

    Dually, a square is the quadrilateral containing the largest area within a given perimeter. [15] Indeed, if A and P are the area and perimeter enclosed by a quadrilateral, then the following isoperimetric inequality holds: 16 A ≤ P 2 {\displaystyle 16A\leq P^{2}} with equality if and only if the quadrilateral is a square.

  4. List of Ancient Greek temples - Wikipedia

    en.wikipedia.org/wiki/List_of_Ancient_Greek_temples

    The Temple of Olympian Zeus, Athens, (174 BC–132 AD), with the Parthenon (447–432 BC) in the background. This list of ancient Greek temples covers temples built by the Hellenic people from the 6th century BC until the 2nd century AD on mainland Greece and in Hellenic towns in the Aegean Islands, Asia Minor, Sicily and Italy ("Magna Graecia"), wherever there were Greek colonies, and the ...

  5. Cathedral floorplan - Wikipedia

    en.wikipedia.org/wiki/Cathedral_floorplan

    Amiens Cathedral floorplan: massive piers support the west end towers; transepts are abbreviated; seven radiating chapels form the chevet reached from the ambulatory. In Western ecclesiastical architecture, a cathedral diagram is a floor plan showing the sections of walls and piers, giving an idea of the profiles of their columns and ribbing.

  6. Isosceles triangle - Wikipedia

    en.wikipedia.org/wiki/Isosceles_triangle

    The area, perimeter, and base can also be related to each other by the equation [24] 2 p b 3 − p 2 b 2 + 16 T 2 = 0. {\displaystyle 2pb^{3}-p^{2}b^{2}+16T^{2}=0.} If the base and perimeter are fixed, then this formula determines the area of the resulting isosceles triangle, which is the maximum possible among all triangles with the same base ...

  7. Surface area - Wikipedia

    en.wikipedia.org/wiki/Surface_area

    A sphere of radius r has surface area 4πr 2.. The surface area (symbol A) of a solid object is a measure of the total area that the surface of the object occupies. [1] The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra (i.e., objects with ...

  8. Area - Wikipedia

    en.wikipedia.org/wiki/Area

    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 fashion a model of the shape, or the amount of paint ...

  9. Spherical trigonometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_trigonometry

    Since the area of a triangle cannot be negative the spherical excess is always positive. It is not necessarily small, because the sum of the angles may attain 5 π (3 π for proper angles). For example, an octant of a sphere is a spherical triangle with three right angles, so that the excess is π /2.

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