Terms for subject Mathematics containing side 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
congruent sides of a the triangle	равные стороны треугольника
each side of a triangle subtends the opposite angle	каждая сторона треугольника противолежит углу
if two sides and the included angle of a triangle are congruent	если две стороны и угол, заключённый между ними, одного треугольника равны (with two sides and the included angle of another triangle then, the triangles are congruent)
if two sides and the included angle of a triangle are congruent	если две стороны и угол, заключённый между ними, одного треугольника равны (with two sides and the included angle of another triangle then, the triangles are congruent; ...)
lateral side of a the triangle	боковая сторона треугольника
midpoint middle point of a the triangle side	середина стороны треугольника
the largest greatest, longest side of a the triangle	наибольшая сторона треугольника
the line joining midpoints of two sides of a triangle	средняя линия
the smallest side of a the triangle	наименьшая сторона треугольника