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Sphere Created from Revolution by dorrod

Sphere Created from Revolution by dorrod
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2017-06-07 09:29
Coordinate GeometrySolid GeometryParametric Equation
This example demonstrates how to generate a sphere by revolving a curve. Key mathematical concepts include coordinate geometry and solid geometry. Using commands like Vector, Sequence, and Parametric Curves in GeoGebra, the sphere's revolution can be constructed. Suitable for high school mathematics education and learning.

GeoGebra Commands & Parameters

  1. Vector(1.1 * d * W_x) → u
  2. Vector(1.1 * d * W_y) → v
  3. Vector(1.1 * d * W_z) → w
  4. Polygon(1.1 * d * (W_x + W_y), 1.1 * d * (-W_x + W_y), 1.1 * d * (-W_x - W_y), 1.1 * d * (W_x - W_y)) → poly1, g, h, i, j
  5. Sequence(CurveCartesian[x(r * cos(0.157 * i) * W_z + r * sin(0.157 * i) * (cos(0.157 * j) * W_x + sin(0.157 * j) * W_y)), y(r * cos(0.157 * i) * W_z + r * sin(0.157 * i) * (cos(0.157 * j) * W_x + sin(0.157 * j) * W_y)), i, 0, 20], j, 0, p) → list3
  6. Sequence(CurveCartesian[x(sqrt(r^(2) - i^(2)) * cos(0.157 * j) * W_x + sqrt(r^(2) - i^(2)) * sin(0.157 * j) * W_y + i * W_z), y(sqrt(r^(2) - i^(2)) * cos(0.157 * j) * W_x + sqrt(r^(2) - i^(2)) * sin(0.157 * j) * W_y + i * W_z), j, 0, p], i, 0, r, 1) → list1
  7. Sequence(CurveCartesian[x(sqrt(r^(2) - i^(2)) * cos(0.157 * j) * W_x + sqrt(r^(2) - i^(2)) * sin(0.157 * j) * W_y - i * W_z), y(sqrt(r^(2) - i^(2)) * cos(0.157 * j) * W_x + sqrt(r^(2) - i^(2)) * sin(0.157 * j) * W_y - i * W_z), j, 0, p], i, 0, r, 1) → list2