Space Visualization Test on Pyramid Edges

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When a pyramid is unfolded into a net, determining the way that the edges are connected requires some spatial thinking. The number in a triangle labels its thick edge. This Demonstration tests your space visualization by asking for the label of the thick edge marked by "?".

Contributed by: Izidor Hafner (February 2021)
Open content licensed under CC BY-NC-SA



Each edge is is associated with two faces. The edges are numbered and displayed by triangulating the faces and putting the edge numberings into the adjoining triangles.

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