document.write( "Question 446299: how would you find the lateral area of a cone with a length of 20 cm and the radius of 9 cm. i have got 9^2 + 20^2 = 481. than take the square root of 481, which is 21.93, but i don't know what to do after that? \n" ); document.write( "
Algebra.Com's Answer #307578 by scott8148(6628)\"\" \"About 
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you found the slant height of the cone ___ this is the radius of the circle that the cone could be cut from\r
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\n" ); document.write( "\n" ); document.write( "the LA of the cone is some fraction of the area of the circle\r
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\n" ); document.write( "\n" ); document.write( "the fraction is the radius of the cone divided by the radius of the circle (which is the slant height of the cone)\r
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\n" ); document.write( "\n" ); document.write( "LA = [9 / sqrt(481)] * pi * [sqrt(481)]^2
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