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  2. Frustum - Wikipedia

    en.wikipedia.org/wiki/Frustum

    The volume of a conical or pyramidal frustum is the volume of the solid before slicing its "apex" off, minus the volume of this "apex": =, where B 1 and B 2 are the base and top areas, and h 1 and h 2 are the perpendicular heights from the apex to the base and top planes. Considering that

  3. Tree volume measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_volume_measurement

    The formula for the volume of a frustum of a paraboloid [23] [24] is: V = (π h/2)(r 1 2 + r 2 2), where h = height of the frustum, r 1 is the radius of the base of the frustum, and r 2 is the radius of the top of the frustum. This allows us to use a paraboloid frustum where that form appears more appropriate than a cone.

  4. Spherical segment - Wikipedia

    en.wikipedia.org/wiki/Spherical_segment

    A spherical segment Pair of parallel planes intersecting a sphere forming a spherical segment (i.e., a spherical frustum) Terminology for spherical segments.. In geometry, a spherical segment is the solid defined by cutting a sphere or a ball with a pair of parallel planes.

  5. Moscow Mathematical Papyrus - Wikipedia

    en.wikipedia.org/wiki/Moscow_Mathematical_Papyrus

    The fourteenth problem of the Moscow Mathematical calculates the volume of a frustum. Problem 14 states that a pyramid has been truncated in such a way that the top area is a square of length 2 units, the bottom a square of length 4 units, and the height 6 units, as shown. The volume is found to be 56 cubic units, which is correct. [1]

  6. Ancient Egyptian mathematics - Wikipedia

    en.wikipedia.org/wiki/Ancient_Egyptian_mathematics

    In this case 8 times 365 is 2920 and further addition of multiples of 365 would clearly give a value greater than 3200. Next it is noted that ⁠ 2 / 3 ⁠ + ⁠ 1 / 10 ⁠ + ⁠ 1 / 2190 ⁠ times 365 gives us the value of 280 we need. Hence we find that 3200 divided by 365 must equal 8 + ⁠ 2 / 3 ⁠ + ⁠ 1 / 10 ⁠ + ⁠ 1 / 2190 ⁠. [8]

  7. Bifrustum - Wikipedia

    en.wikipedia.org/wiki/Bifrustum

    In geometry, an n-agonal bifrustum is a polyhedron composed of three parallel planes of n-agons, with the middle plane largest and usually the top and bottom congruent.. It can be constructed as two congruent frusta combined across a plane of symmetry, and also as a bipyramid with the two polar vertices truncated.

  8. Antiquarian science books - Wikipedia

    en.wikipedia.org/wiki/Antiquarian_science_books

    Antiquarian science books are original historical works (e.g., books or technical papers) concerning science, mathematics and sometimes engineering.These books are important primary references for the study of the history of science and technology, they can provide valuable insights into the historical development of the various fields of scientific inquiry (History of science, History of ...

  9. Volume table - Wikipedia

    en.wikipedia.org/wiki/Volume_table

    Difficulties occur when estimating the form class of the tree in question. The Mesavage and Girard form classes used to classify the trees to decide which volume table should be used. These volume tables are also based on different log rules such a Scribner, Doyle, and International 1 ⁄ 4 in (6.4 mm) scale. In order to be effective, the ...