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Law Of Cosines Calculator

Calculate triangle area from three sides, or from two sides and the included angle in degrees. A handy helper for geometry and trig problems.

Enter the Details

units

units

   units

  deg

deg

deg


Result will appear here...


Last updated: March 1, 2026

Created by: Eon Tools Dev Team

Reviewed by: Okan Atalay





Okan Atalay

Okan Atalay is a results driven senior operations manager and a graduate of Industrial Engineering from Bilkent University. With over 22 years of experience in textile manufacturing and integrated operations, he has led large scale business process improvements and strategic planning initiatives. Currently, he serves as a top mathematics expert for a global ed tech platform, where he applies his analytical expertise to solve complex mathematical problems. At Eon Tools, he reviews converter and maths tools.