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## Homework Statement

If A-B-C (vectors) and A^2+ B^2+ c^2 where X is the magnitude of X(vector) for X-A,B,C, then the vectors A and B are perpendicular to each other. (True or false?)

## Homework Equations

## The Attempt at a Solution

Honestly, I never post anything unless I have it at least halfway solved. But I'm completely confused by this question. Can anyone help me?