Consider the circle with centre A. [br]CD is a chord of the circle.[br]Move the positions of C or D to change the length of CD .[br]Observe the values of CE and DE. What can you say about E?[br]What is AE? [br]What happens to the measure of the angle AED as you change the length of CD?[br]Move the position of A to change the radius of the circle.[br]Repeat the experiment. [br]What do you observe?[br]Frame the theorem based on your Observation.