Question

what is basic proportionality thorem ?

Answer 1

Basic Proportionality Theorem (Thales theorem):If a line is drawn parallel to one side of a triangle intersecting other two sides, then it divides the two sides in the same ratio. 

Proof on Thales theorem :

If a line is drawn parallel to one side of a triangle and it intersects the other two sides at two distinct points then it divides the two sides in the same ratio.

Answer 2

Basic proportionality theoram

If a line is drawn Parallel to one side of a triangle , then the line will divide the other two sides in same ratio........

It is also known as Thales theoram