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<p>its side lengths are collectively known as a <a href="page.php?w=Pythagorean_triple">Pythagorean triple</a>.</p>

<p>The relations between the sides and angles of a right triangle provide one way of defining and understanding <a href="page.php?w=trigonometry">trigonometry</a>, the study of the metrical relationships between lengths and angles.</p>

<p><big>Principal properties</big></p>
<p><big>Sides</big></p>
<p>The three sides of a right triangle are related by the <a href="page.php?w=Pythagorean_theorem">Pythagorean theorem</a>, which in modern algebraic notation</p><p>
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