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Earth is Round

Earth is Round
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2019-10-31 02:06
VectorSolid GeometryGeometric Construction
This example demonstrates the principle that the Earth is round using geometric construction. Key mathematical concepts include angles, vectors, and circle arcs. It utilizes commands such as Intersect, Sphere, and CircleArc in GeoGebra. Suitable for high school and above students learning solid geometry and circle-related knowledge.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, zAxis) → A
  2. Sphere(A, 6356.752) → a
  3. CircleArc(A, C, D) → c
  4. CircleArc(A, D, B) → d
  5. CircleArc(A, C, B) → e
  6. PointIn(a) → E
  7. PointIn(a) → F
  8. PointIn(a) → G
  9. Plane(E, F, G) → p

AI Drawing Prompt Reference

Draw a sphere with its center at the intersection of the x-axis and z-axis, and a radius of 6356.752 kilometers. Then draw three arcs on the sphere connecting the center to points C, D, and B. Finally, draw a plane through three random points E, F, and G on the sphere.
The prompt above was compiled from the original drawing commands and is for reference only.