Niyakuba nezilinganiso ezilungileyo , ne-efa elilungileyo , nebhati elilungileyo.

I-efa nebhati kuyakuba yisilinganiso sinye , ukuze ibhati lifumbathe okweshumi kwehomere, ne-efa okweshumi kwehomere, isilinganiso salo sibe ngokwehomere.