Centra simetrio

centra simetrio de figuro F al figuro F' rilate punkton P
SP(Q) = R

Centra simetrio rilate punkton P estas tia geometria transformado SP de ebeno aŭ spaco, ke SP(Q) = R nur tiam kiam punkto P estas centro de segmento de QR. Punktoj Q kaj R nomiĝas punktoj simetriaj rilate al la centro de simetrio P.

Centro de simetrio de geometria figuro

Geometria figuro F, kiu estas bildo de si mem sub transformo SP, kiu estas centra simetrio, t.e. SP(F) = F, havas la centron de simetrio en punkto P. Geometria figuro havas ne pli ol unu centron de simetrio.

Ecoj

Vidu ankaŭ


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