# geometry

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prove triangular inequality: if P,Q, and R are not collinear, then PQ + QR is greater than PR.

• geometry -

I believe you are looking at the Inequality Theorem (T055) which states "the sum of the lengths of any two sides of a triangle is greater than the length of the third side." I think it will take you 10 or so steps to prove it. Good luck!

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