In triangle abc d is the midpoint of bc and
- in triangle abc if d is the midpoint of bc and ad
- in a triangle abc if d is the midpoint of bc and ad is perpendicular to ac
- in triangle abc d is the midpoint of bc and g is the centroid
- in triangle abc d is the midpoint of bc and ae is perpendicular to bc
- in triangle abc d is the midpoint of bc and ed is the bisector
- in triangle abc d is the midpoint of bc and e is the midpoint of ad
