document.write( "Question 28084: When the question says Determine whether a triangle with the given side lengths is a right angle I just don't get it. They will give numbers like 8 m, 15 m, 17 m. And I don't know how to make sure it's a right angle \n" ); document.write( "

Algebra.Com's Answer #15310 by longjonsilver(2297) $\"\"$ $\"About$

You can put this solution on YOUR website!
In a right-angled triangle, the square of the longest side (the hypotenuse) IS equal to the sum of the squares of the other 2 sides:\r
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\n" ); document.write( "\n" ); document.write( "So, if $\"17%5E2\"$ is the same as $\"8%5E2%2B15%5E2\"$ then the triangle IS right-angled.\r
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\n" ); document.write( "\n" ); document.write( " $\"17%5E2\"$ is 289
\n" ); document.write( " $\"8%5E2%2B15%5E2\"$ is 64 + 225 which is also 289\r
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\n" ); document.write( "\n" ); document.write( "so this IS a right-angled triangle.\r
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\n" ); document.write( "\n" ); document.write( "jon.
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