The bottom five triangles are made vertical. This makes the Icosa-Dome conveniently modular - domes can be joined together in any number of patterns.

Drawing shows the original Icosa-Dome and the Icosa-Dome modified to make the Vertical Base.

Two of the modular dome units joined together:

Four views of the modular dome unit:

Six of the modular units joined together:

Pictorial view of the Six Dome Cluster:

Four pages on the latest vertical base modifications and joined cluster domes>>
Icosa-Dome | Icosa-Dome Variations

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