document.write( "Question 994990: Geometry
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Algebra.Com's Answer #613874 by Alan3354(69443)\"\" \"About 
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Find the measure of angle A when angle B is 129 degrees and angle C is 138 degrees
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\n" ); document.write( "B + C = 267 degrees.
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\n" ); document.write( "The sum of the 3 angles of all plane triangles = 180 degs.
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