Terms for subject Mathematics containing vertex of a triangle

English	Russian
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
A median of a triangle is a segment from a vertex to the midpoint of the opposite side of the vertex	медиана треугольника
an altitude of a triangle is a segment from a vertex and it is perpendicular to the opposite side of the vertex	высота треугольника
the center of gravity of a the triangle divides each median by ratio 2:1, considering from a vertex	делить в отношении