Cross Sections of a Square Pyramid by Jonathan Isozaki

Cross Sections of a Square Pyramid by Jonathan Isozaki
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2017-02-14 13:30
This example demonstrates the dynamic visualization of cross-section shapes formed by intersecting a square pyramid with various planes at different positions. Key mathematical concepts include solid geometry, cross-sectional analysis, symmetry, and the intersection of planes with three-dimensional figures. The construction utilizes GeoGebra commands such as Intersect, Point, Polygon, Pyramid, and Plane to create and manipulate the geometric objects. It is suitable for high school students studying three-dimensional geometry, helping them understand the properties of cross-sections and theorems related to them.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(yAxis) → B
  3. Point(xAxis) → C
  4. Polygon(A, B, D, C) → poly1, a, b, d, c
  5. Pyramid(C, D, B, A, E) → e, faceABDC, edgeCE, edgeDE, edgeBE, edgeAE, faceCDE, faceBDE, faceABE, faceACE, edgeCD, edgeBD, edgeAB, edgeAC
  6. Point(edgeBE) → F
  7. Point(edgeAE) → G
  8. Plane(D, C, G) → i