點解有Right Rhombus Pyramid?

2007-02-16 3:20 am

Right Pyramid 要唔要每條 lengths of the base 都一樣???(長方形唔係, 但有right rectangle pyramid)??

點解有Right Rhombus Pyramid:
Right pyramid 要所有 slant edge 的長都要一樣, 但rhombus 一定唔得ga wo, 因為佢兩條diagonals 的長度不一樣, 一用Pyth. thm. 一看就知不是所有 slant edge 的長都一樣 ga wo?

回答 (1)

用戶110100

2007-02-16 10:16 am

✔ 最佳答案

Pyramid: A polyhedron in which all but one of the polygonal faces intersect at a single point known as the vertex of the pyramid. The side which does not intersect at the vertex is called the "base".

Right Pyramid: A pyramid whose base is a regular polygon and in which the segment connecting its vertex to the center of its base is perpendicular to the plane of the base.
In a right pyramid, the vertex will always be directly above the center of the regular polygon base.

Regular Pyramid: A right pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles.

Rhombus: A quadrilateral with all sides of the same length.

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