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95 lines
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HTML
95 lines
5.1 KiB
HTML
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<h1 align="center"> Triangle Identities</h1>
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<h3 align="center">You might like to read our page on <a href="trigonometry.html">Trigonometry</a> first! </h3>
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<h2>Triangle Identities </h2>
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<p>The <b>triangle identities</b> are equations that are true for all triangles (they don't need to have a right angle). For the identities involving right angles triangles see <a href="trigonometric-identities.html">Trigonometric Identities</a>.</p>
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<h3> Law of Sines </h3>
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<p>The <b><a href="trig-cosine-law.html">Law of Cosines</a></b> (also known as The Cosine Rule) is an extension of the <a href="../pythagoras.html">Pythagorean Theorem</a> to any triangle:</p>
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<p>which can also be re-arranged to:</p>
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<h3> Law of Tangents </h3>
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<p>The Law of Tangents is:</p>
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<div class="related"> <a href="../sine-cosine-tangent.html">Sine, Cosine and Tangent</a> <a href="../geometry/unit-circle.html">Unit Circle</a> </div>
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