Determine the value of x when given two tangent lines to a circle

The video tutorial explains the concept of congruent lines and tangent lines in geometry. It discusses how two tangent lines from a point outside a circle are congruent and equal in measurement. The tutorial also covers solving for X using an equation derived from the properties of tangent lines. The instructor answers questions and clarifies misconceptions about congruency and tangent lines.

What is the significance of the statement 'AD is perpendicular to the circle' in relation to line CD?

Why is it important to have two tangent lines to determine congruence?