Enrhifo
\frac{\sqrt{2}}{2}\approx 0.707106781
Rhannu
Copïo i clipfwrdd
\frac{400+\left(20\sqrt{2}\right)^{2}-400}{2\times 20\times 20\sqrt{2}}
Cyfrifo 20 i bŵer 2 a chael 400.
\frac{400+20^{2}\left(\sqrt{2}\right)^{2}-400}{2\times 20\times 20\sqrt{2}}
Ehangu \left(20\sqrt{2}\right)^{2}.
\frac{400+400\left(\sqrt{2}\right)^{2}-400}{2\times 20\times 20\sqrt{2}}
Cyfrifo 20 i bŵer 2 a chael 400.
\frac{400+400\times 2-400}{2\times 20\times 20\sqrt{2}}
Sgwâr \sqrt{2} yw 2.
\frac{400+800-400}{2\times 20\times 20\sqrt{2}}
Lluosi 400 a 2 i gael 800.
\frac{1200-400}{2\times 20\times 20\sqrt{2}}
Adio 400 a 800 i gael 1200.
\frac{800}{2\times 20\times 20\sqrt{2}}
Tynnu 400 o 1200 i gael 800.
\frac{800}{40\times 20\sqrt{2}}
Lluosi 2 a 20 i gael 40.
\frac{800}{800\sqrt{2}}
Lluosi 40 a 20 i gael 800.
\frac{800\sqrt{2}}{800\left(\sqrt{2}\right)^{2}}
Mae'n rhesymoli enwadur \frac{800}{800\sqrt{2}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{2}.
\frac{800\sqrt{2}}{800\times 2}
Sgwâr \sqrt{2} yw 2.
\frac{\sqrt{2}}{2}
Canslo 800 yn y rhifiadur a'r enwadur.
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