Circle Properties Investigative Activity 7
Instructions
A, B, C and D are points on the circumference of the circle.
An exterior angle is an angle outside of the cyclic quadrilateral, formed by extending one side of the quadrilateral.
Select one of the checkboxes, to show 1 of 2 possible exterior angles.
Move points A, B, C and/or D around to observe the relationship between the exterior angle and the interior opposite angle.
What do you observe about the angles and ?
What can you conclude?