document.write( "Question 1151194: The side length of square A is 36 cm. The side length of square B is 42 cm. What is the ratio of the area of square A to the area of square B? Express your answer as a common fraction. \n" ); document.write( "
Algebra.Com's Answer #772855 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "The solution by tutor @MathLover1 is perfectly good... but it involves calculations much more complicated than necessary. The solution can be achieved much more easily using a basic fact about similar figures.

\n" ); document.write( "All squares are similar. The ratio of the side lengths of the two squares is 36:42 = 6:7.

\n" ); document.write( "In any similar figures, the ratio of area measurements is the square of the ratio of the linear measurements. So the ratio of the areas of these two squares is 6^2:7^2 = 36:49; or, expressed as a common fraction, 36/49.

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