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If your using this as the Pythagorean theorem then this is correct. You can use

a2+b2=c2 to find the missing side on a right triangle only. However, in the law of cosines, it is c2=a2+b2-2ab cos C. In a right triangle, the cosine of C is the angle opposite the hypotenuse which is 90o. The cosing of 90o is 0 so you would be left with a2+b2=c2.

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15y ago

What else can I help you with?