document.write( "Question 88174: if a quadrilateral is inscribed in a circle its opposite angles will be supplementary. find the measure of angle A if the measure of angle C=40 degrees \n" ); document.write( "
Algebra.Com's Answer #64125 by rapaljer(4671)\"\" \"About 
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If angles A and C are supplementary, and angle C is 40 degrees, then angle A is 180-40 = 140 degrees.\r
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