document.write( "Question 195490: Hi I have a question about how to find out if a set of three numbers can be sides of a triangle or not. I remember doing this in class, & I remember that it was really easy... I think it's something like if you get a certain number from using the Pythagorean Theorem, it's a right triangle, if you get this number, it's an acute, etc.... I just don't remember what exactly to do, although I do recall that it involves the Pythagorean Theorem, correct? I don't have the notes from this b/c I cleared out my binder. It gets too full if I keep all of the papers from the entire year, so I take old chapters out. No, I don't know any Pythagorean triplets, & no i don't think the units matter. This is all I remember.... This is the question:\r
\n" ); document.write( "\n" ); document.write( "Which of the following could not be the lengths of the sides of a triangle?\r
\n" ); document.write( "\n" ); document.write( "A: 5km, 2km, 4km
\n" ); document.write( "B: 3cm, 4cm, 5cm <== might be a triplet...
\n" ); document.write( "C:4in, 6in, 8in
\n" ); document.write( "D:6ft, 3ft, 9ft\r
\n" ); document.write( "\n" ); document.write( "Thank you in advance, I'd love your help! :D
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Algebra.Com's Answer #146622 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Which of the following could not be the lengths of the sides of a triangle?
\n" ); document.write( "A: 5km, 2km, 4km
\n" ); document.write( "B: 3cm, 4cm, 5cm <== might be a triplet...
\n" ); document.write( "C:4in, 6in, 8in
\n" ); document.write( "D:6ft, 3ft, 9ft
\n" ); document.write( "---------------------
\n" ); document.write( "This is not a Pythagorean problem.
\n" ); document.write( "You are not checking to see if you have a right triangle.
\n" ); document.write( "You want to know if the three sides could be the sides of a triangle (any
\n" ); document.write( "triangle).
\n" ); document.write( "----
\n" ); document.write( "Criteria: The sum of every two sides must be greater than the 3rd side.
\n" ); document.write( "Example: sides of 1,2, and 7 could not be a triangle.
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\n" ); document.write( "Your Problem.
\n" ); document.write( "6,3,9 would not form a triangle.
\n" ); document.write( "Try it and you'll see.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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