Evaluate
\frac{\sqrt{7}}{3}\approx 0.881917104
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\frac{2\sqrt{7}}{6}
Factor 28=2^{2}\times 7. Rewrite the square root of the product \sqrt{2^{2}\times 7} as the product of square roots \sqrt{2^{2}}\sqrt{7}. Take the square root of 2^{2}.
\frac{1}{3}\sqrt{7}
Divide 2\sqrt{7} by 6 to get \frac{1}{3}\sqrt{7}.
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