Question 1076771
by definition, the sum of all interior angles in triangle is {{{180}}}

if {{{m}}} < {{{D }}}= {{{2}}} ({{{m}}} < {{{E}}} + {{{m}}} <{{{ F}}}), could be true only if 
for example {{{m}}} < {{{D=120 }}} and {{{m}}} < {{{E=34}}} + {{{m}}} <{{{ F=26}}}

{{{D =2(E+F)}}}
{{{120=2(34+26)}}}
{{{120=2(60)}}}
{{{120=120}}}

the term that best describes triangle {{{DEF}}} is C) {{{obtus}}}

ps: sorry for previous mistake