document.write( "Question 362199: in ∆DEF, the sum of the measures of \n" ); document.write( "

Algebra.Com's Answer #258255 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"D%2BE=110\"$
\n" ); document.write( "2. $\"E%2BF=150\"$
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\n" ); document.write( "For every triangle,
\n" ); document.write( " $\"D%2BE%2BF=180\"$
\n" ); document.write( "Substitute from eq. 1,
\n" ); document.write( " $\"110%2BF=180\"$
\n" ); document.write( " $\"highlight%28F=70%29\"$ degrees
\n" ); document.write( "Substitute from eq. 2,
\n" ); document.write( " $\"D%2B150=180\"$
\n" ); document.write( " $\"highlight%28D=30%29\"$ degrees
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"30%2BE=110\"$
\n" ); document.write( " $\"highlight%28E=80%29\"$ degrees \n" ); document.write( "

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