Kaonetsedwe kachibadwa: fulakishoni ya marutu

Mu kaonetsedwe kachibadwa, mafulakishoni ndi marutu amalembedwa mmene amaonekera. Lembani $\displaystyle \frac{2+\sqrt{2}}{1+\sqrt{2}}$. Dinani : fulakishoni ikuonekera ndi mabokosi 2 opanda kanthu. Lembani 2, dinani , kenako , ndipo lembani 2 pansi pa rutu. Dinani kamodzi kuti mutuluke mu rutu, ndi kachiwiri kuti mutsikire pansi pa fulakishoni. Lembani 1, dinani , , ndi 2. Dinani . Yankho ndi $\displaystyle \sqrt{2}$, loonetsedwa ngati rutu.

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