7. The Tangent-Tangent Theorem
Points C and D both lie on the circumference of the circle and have tangent lines passing through them. Point A is the point where the two tangent lines intersect away from the circle.
Move around points C and D and observe the change in the length of the line segments AC and AB.
Do you think that there is a relationship between the length of these line segments?
Mark the checkbox to confirm the relationship between the lengths of the line segments.
Can you prove it?