Terms containing vertex of a triangle

Subject	English	Russian
math.	a bisector bisectrix of a the triangle is the segment of the corresponding angle bisector bisectrix from the vertex to the point of intersection with the opposite side	биссектриса треугольника
math.	A median of a triangle is a segment from a vertex to the midpoint of the opposite side of the vertex	медиана треугольника
math.	an altitude of a triangle is a segment from a vertex and it is perpendicular to the opposite side of the vertex	высота треугольника
math.	the center of gravity of a the triangle divides each median by ratio 2:1, considering from a vertex	делить в отношении
Makarov.	vertex of a triangle	вершина треугольника