document.write( "Question 280329: Dear Sir, Please help me!\r
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\n" ); document.write( "\n" ); document.write( "ABCDEFGH is a regular octagon calculate ABC ACD ABD angles
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Algebra.Com's Answer #203736 by Alan3354(69443)\"\" \"About 
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ABCDEFGH is a regular octagon calculate ABC ACD ABD angles
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\n" ); document.write( "Each interior angle is 135 degs
\n" ); document.write( "ABC = 135 degs
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\n" ); document.write( "ACB = (180 - 135)/2 = 22.5 degs, so ACD = 135 - 22.5
\n" ); document.write( "ACD = 112.5 degs
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\n" ); document.write( "ABD = ACD = 112.5 degs
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