Mathematics & calculation

Perimeter of a Triangle Calculator

Calculate the perimeter of a triangle from its three sides, or from two sides and the angle between them using the law of cosines. Triangle inequality check, worked examples and different units accepted for each side.

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<div
  class="bethemesh-widget"
  data-tool="triangle-perimeter-calculator"
  data-lang="en"
  data-theme="auto"
  data-min-height="360"
  data-max-height="760"
  data-sandbox="allow-scripts allow-same-origin"
  data-allow="clipboard-write"
></div>
<script src="https://bethemesh.com/widgets/v1/bethemesh.js" async></script>
<p style="margin:6px 0 0;font:12px/1.4 system-ui,sans-serif">Free tool by <a href="https://bethemesh.com/en/tools/triangle-perimeter-calculator">Bethemesh</a></p>

The documentation details the options, themes, sizes and the integration in each CMS. The code works in an HTML page, WordPress, Webflow, Wix, React, Vue or Astro.

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Perimeter of a Triangle Calculator

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