document.write( "Question 1139854: Help with Trigonometric ratios
\n" ); document.write( "A square has a side length of 20 cm. If a diagonal is drawn, what is the length of the diagonal? Give the exact value, not an approximation.
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Algebra.Com's Answer #760337 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "A \"square\" has a side length of \"a=20cm\". \r
\n" ); document.write( "\n" ); document.write( "If a diagonal is drawn, a \"square\" is divided in two right triangles where a diagonal is hypotenuse and sides of the square are legs\r
\n" ); document.write( "\n" ); document.write( "use Pythagorean theorem to find the length of the diagonal \"d\"\r
\n" ); document.write( "\n" ); document.write( "\"d%5E2=a%5E2%2Ba%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"d%5E2=2a%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"d%5E2=2%2820cm%29%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"d=sqrt%282%2820cm%29%5E2%29\"\r
\n" ); document.write( "\n" ); document.write( "\"d=20sqrt%282%29cm\"->the exact value\r
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