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Visualizing Volumes by Known Cross Sections

Visualizing Volumes by Known Cross Sections
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2020-02-28 04:11
Solid GeometryCalculusIntegralGeometric ConstructionGraphing
This example demonstrates how to visualize the volume of solids with known cross sections using integral calculus. It involves core concepts like integration, solid geometry, and function graphing. Key GeoGebra commands used include Polygon and Sequence, with objects like f, g, X, n, A, B. Ideal for high school students and learners needing a visual understanding of integrals and volumes.

GeoGebra Commands & Parameters

  1. Polygon((X, f(X), 0), (X, f(X), f(X) - g(X)), (X, g(X), f(X) - g(X)), (X, g(X), 0)) → poly1, a, b, c, d
  2. Sequence(Polygon[(((k * X)) / n, f(((k * X)) / n), 0), (((k * X)) / n, f(((k * X)) / n), f(((k * X)) / n) - g(((k * X)) / n)), (((k * X)) / n, g(((k * X)) / n), f(((k * X)) / n) - g(((k * X)) / n)), (((k * X)) / n, g(((k * X)) / n), 0)], k, 1, n) → list1
  3. Sequence(CircumcircleArc[((k * X / n), f((k * X / n)), 0), ((k * X / n), (f((k * X / n)) + g((k * X / n))) / 2, (f((k * X / n)) - g((k * X / n))) / 2), ((k * X / n), g((k * X / n)), 0)], k, 1, n) → list3
  4. Sequence(Polygon[((k * X / n), f((k * X / n)), 0), ((k * X / n), (f((k * X / n)) + g(((k * X)) / n)) / 2, (sqrt(3) * (f((k * X / n)) - g((k * X / n))) / 2)), ((k * X / n), g((k * X / n)), 0)], k, 1, n) → list2