Let the incircle of triangle $ABC$ be tangent to sides $\overline{BC}$, $\overline{AC}$, and $\overline{AB}$ at $D$, $E$, and $F$, respectively. Prove that triangle $DEF$ is acute.

Question

I have tried proving that triangle DEF's angles were les than the opposite angles in triangle ABC, but that wasn't really complete. Can anyone help?

Answer 1

What do all the dollar signs ($) signify?

Answer 2

They're just a format you can ignore them

Answer 3

Please do not post the questions we give you for homework to other websites.

Answer 4

haha nice try maight