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<a accesskey="3" href="page.php?w=YBC_7289&amp;p=2">3.Next</a>
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<p><b>YBC 7289</b> is a <a href="page.php?w=Babylonia">Babylonia</a>n <a href="page.php?w=clay_tablet">clay tablet</a> notable for containing an accurate <a href="page.php?w=sexagesimal">sexagesimal</a> approximation to the <a href="page.php?w=square_root_of_2">square root of 2</a>, the length of the diagonal of a <a href="page.php?w=unit_square">unit square</a>. This number is given to the equivalent of six decimal digits, "the greatest known computational accuracy ... in the ancient world". The tablet is believed to be the work of a student in</p><p>
<a accesskey="3" href="page.php?w=YBC_7289&amp;p=2">3.Next</a>
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