NCERT Math -Similar triangles video lecture. If a line is drawn parallel to one side of a triangle to intersect the two other sides in two distinct points, the other two sides are divided in the same ratio.
Recorded solution of ncert text book and all premium reference books.Converse of basic proportionality theorem or If a line divides any two sides of a triangle in the same ratio, then the line must be parallel to the third side.
