document.write( "Question 919196: Write a two-column proof forth following:
\n" ); document.write( "1.If two angles are congruent and supplementary, then each is a right angle? \n" ); document.write( "
Algebra.Com's Answer #557549 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "If two supplementary angle are congruent then, they are right angles\r
\n" ); document.write( "\n" ); document.write( "Given: <1 and <2 congruent
\n" ); document.write( "<1 and <2 are supplelmentary\r
\n" ); document.write( "\n" ); document.write( "Prove: <1 and <2 are right angles\r
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\n" ); document.write( "\n" ); document.write( "Statements: .................................. Reasons
\n" ); document.write( "1) <1 and <2 congruent ----------------------------- Given
\n" ); document.write( "2) m <1 = m <2 ----------------------------- Definition of congruent angles
\n" ); document.write( "3) <1 and <2 are suppl. <'s ------- Given
\n" ); document.write( "4) m <1 + m <2 = 180 --------------- Def. of supplementary < ‘s
\n" ); document.write( "5) m <1 + m <2 = 180 --------------- Law of Substitution
\n" ); document.write( "6) 2m <1 = 180 ----------------------- Combination of similar terms
\n" ); document.write( "7) m <1 = 90 -------------------------- MPE
\n" ); document.write( "8) <1 is a right < -------------------- Def. of a right <
\n" ); document.write( "9) m <2 = 90 -------------------------- TPE
\n" ); document.write( "10) < 2 is a right < ------------------ Def. of a right <
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