Enrhifo
\frac{9\sqrt{10}}{20}\approx 1.423024947
Rhannu
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\frac{6\times 3\sqrt{2}}{40}\sqrt{5}
Mynegwch 6\times \frac{3\sqrt{2}}{40} fel ffracsiwn unigol.
\frac{6\times 3\sqrt{2}\sqrt{5}}{40}
Mynegwch \frac{6\times 3\sqrt{2}}{40}\sqrt{5} fel ffracsiwn unigol.
\frac{18\sqrt{2}\sqrt{5}}{40}
Lluosi 6 a 3 i gael 18.
\frac{18\sqrt{10}}{40}
I luosi \sqrt{2} a \sqrt{5}, dylid lluosi'r rhifau dan yr ail isradd.
\frac{9}{20}\sqrt{10}
Rhannu 18\sqrt{10} â 40 i gael \frac{9}{20}\sqrt{10}.
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