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Year 9 - Right Circular Cone

Year 9 - Right Circular Cone
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2020-03-26 09:06
Solid GeometryTransformationGeometric Construction
This example demonstrates the construction of a right circular cone. Key mathematical concepts include the geometric properties of a cone, reflection, exponent, algebra, and division. Using GeoGebra commands such as Dilate (缩放), Vector (向量), Translate (平移), Arc (弧), Polygon (多边形), Segment (线段), and Midpoint (中点), a model of the right circular cone can be constructed. Suitable for Year 9 students studying solid geometry.

GeoGebra Commands & Parameters

  1. Dilate(B, height, A) → C
  2. Vector(A, C) → u
  3. Translate(P, u) → E
  4. Arc(c, 3.141592653589793, 0) → f
  5. Polygon(L, E, R) → Q, r_1, l, e
  6. Segment(E, P) → a
  7. Segment(P, R) → b
  8. Midpoint(E, P) → D
  9. Midpoint(P, R) → F
  10. Midpoint(E, R) → S
  11. Midpoint(a) → K