Terms for subject Mathematics containing from side to side

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
from side to side	из стороны в сторону
the perpendicular from center to a side of a regular polygon	апофема правильного многоугольника