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<p>and architecture.</p>

<p><big>History</big></p>
<p>The Kepler triangle is named after the German <a href="page.php?w=mathematician">mathematician</a> and <a href="page.php?w=astronomer">astronomer</a> <a href="page.php?w=Johannes_Kepler">Johannes Kepler</a> (1571-1630), who wrote about this shape in a 1597 letter. Two concepts that can be used to analyze this triangle, the <a href="page.php?w=Pythagorean_theorem">Pythagorean theorem</a> and the golden ratio, were both of interest to Kepler, as he wrote elsewhere:</p>

<p>However, Kepler was not the first</p><p>
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