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anonymous

  • 5 years ago

Two sides of a triangle have lengths of 5x and 11x. The length of the third ide can be any number between ___ and ___.

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  1. nowhereman
    • 5 years ago
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    You have to apply the triangle inequality!

  2. anonymous
    • 5 years ago
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    I don't know how, though. I'm trying to understand it, can you walk me through it?

  3. nowhereman
    • 5 years ago
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    It's a basic property of a triange: The sum of two side length must always be bigger then the third side length. It comes from the fact, that the sides of a triangle are the shortest connections between the points and if you take the connection going over the third point, you must get a longer path. So if the side length are called a, b and c you get \[\begin{gather}a+b \geq c\\b+c \geq a\\c+a \geq b\end{gather}\]

  4. nowhereman
    • 5 years ago
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    Now just insert the given length and see which inequality gives you a range for the third side.

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