document.write( "Question 525402: the diagonal of a square is the square root of 15. what is the perimeter of the square? \n" ); document.write( "
Algebra.Com's Answer #348090 by oberobic(2304)\"\" \"About 
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The diagonal of a square is the hypotenuse of a right triangle.
\n" ); document.write( "Applying the Pythagorean formula...
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\n" ); document.write( "15 = a^2 + b^2
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\n" ); document.write( "Since it is a square, we know that a=b
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\n" ); document.write( "15 = 2a^2
\n" ); document.write( "a^2 = 7.5
\n" ); document.write( "a = sqrt(7.5)
\n" ); document.write( "a = 2.738612787525831
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\n" ); document.write( "So the sides are 2.738612787525831.
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\n" ); document.write( "The perimeter = 4*2.738612787525831 = 10.95445115010332
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\n" ); document.write( "Done.
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