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Reporting a wrong result
To help us reproduce the problem quickly, please include:
- The share link. Click Copy shareable link next to the calculator inputs and paste the link. It holds the exact values, units, and angle mode you used.
- What you expected to get, and where that number came from (a textbook, another tool, a hand calculation).
- Your browser and device, if the page looks or behaves wrong.
Before you write
Many common questions, such as how to find a missing side, why the angles must add up to 90°, or how to tell if a triangle is a right triangle, are answered on the FAQ page. Every formula the calculators use is on the right triangle formulas page.
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