3 Let be incenter of triangel, be midpoint of side, and be the intersection point of with incircle, in such a way that is between and . Prove that, if and only if .
3 Hayaan ay incenter ng triangel, ay midpoint ng gilid, At ang intersection point ng may incircle, sa paraan na ay sa pagitan ng at . Patunayan na ang, Kung at kung lamang .