document.write( "Question 1149601: ABCD is a square with sides 9cm. Arcs of radius 9cm are drawn with centres at B and D. Find the area of the shaded region. \r
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Algebra.Com's Answer #770940 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "Draw diagonal AC, dividing the shaded region into two congruent pieces.

\n" ); document.write( "The area of each of those pieces is the difference between the areas of (a) a quarter circle with radius 9 and (b) an isosceles right triangle with legs of length 9.

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