Quatrefoil
Il quatrefoil si forma dall’unione di 4 cerchi interlacciati, ciascuno passante per i centri dei 2 cerchi contigui.
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Quatrefoil
Il quatrefoil si forma dall’unione di 4 cerchi interlacciati, ciascuno passante per i centri dei 2 cerchi contigui.
Trifoil
Il trifoil si forma dall’unione di 3 cerchi interlacciati, ciascuno passante per i centri degli altri 2.
Bifoil
Il bifoil o double bubble deriva dall’unione di due cerchi di raggio uguale, ciascuno passante per il centro dell’altro.