- Thread starter
- #1
Albert
Well-known member
- Jan 25, 2013
- 1,225
$\triangle ABC (with \,\, side \,\, length \,\, a,b,c)$
$if :2b<a+c$
$prove :2\angle B <\angle A +\angle C$
$if :2b<a+c$
$prove :2\angle B <\angle A +\angle C$
