document.write( "Question 738329: Statement: ∠a and ∠b are supplementary angles
\n" ); document.write( " ∠c and ∠d are supplementary angles\r
\n" ); document.write( "\n" ); document.write( "Question: What is the reason for this statement?\r
\n" ); document.write( "\n" ); document.write( "Mutiple choices: 1) definition of supplementary angles.
\n" ); document.write( " 2) If two angles are congruent and form a linear pair, they are right angles.
\n" ); document.write( " 3) All right angles are congruent
\n" ); document.write( " 4) If two angles form a linear pair, they are supplementary angles.
\n" ); document.write( "Additional information: Given: ∠a ≅ ∠d
\n" ); document.write( " Prove: ∠b ≅ ∠c
\n" ); document.write( "

Algebra.Com's Answer #450763 by fcabanski(1391)\"\" \"About 
You can put this solution on YOUR website!
There seems to be a diagram missing. \n" ); document.write( "
\n" );