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OpenStudy (shealah):
In triangle DEF m D=90 and m F is 12 degrees less than twice m E. Find m E
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OpenStudy (anonymous):
make an equation and solve. mD+mE+mF=180 90+x+2x-12=180 x=mE 90+3x=192 3x=102 x=34 mE=34
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