Copy of opening a cube

Author:丁明智, Arthur Lee

A cube is divided into 6 congruent right pyramids. Drag the yellow dot to 'close' the cube. This shows the volume of a square base pyramid with height equal to half its base edge.

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bewijs stelling van Pythagoras
רישום חופשי
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استكشاف نظرية فيثاغورث
Upper & Lower Riemann Sum
points line and planes
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