Question

explain Thales theorem

Answer 1

Thales theorem is useful when you are trying to find the center of the circle.In the figure(attached file)right angle whose vertex is on the circle always cutting off a diameter. That is, the points P,Q are always the end of diameter line. 

Answer 2

thales theorem states that in a triangle when a line is drawn from one side parallel to another side intersect the third side then the ratio made by the interception is in proportionally same