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June 27th, 2019, 10:34 AM   #1
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Triangle statement

Prove that the sum of any two lengths of a triangle is larger than the one left .
Assume the triangle’s lengths are $\displaystyle a,b,c$ .
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June 27th, 2019, 10:38 AM   #2
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There are a zillion proofs of the triangle inequality on the net.

What is your purpose for posting this question here? As a test?
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June 27th, 2019, 10:40 AM   #3
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Just searching a proof in short-terms without trygonometry .
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