AMC / AIME · Triangle Inequality · Medium

Triangle Inequality: A triangle has integer sides math. Find the sum of all possible math.

Existence and bounds.

Try the problem

A triangle has integer sides 4,9,x4,9,x. Find the sum of all possible xx.

Hint and answer

Concept to use

Perimeter bounds.

Hint

Combine side bounds with angle and right-triangle facts.

Answer

63

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