Tangent of a Circle  Definition & Example 

In this lesson we will learn about tangent of a circle, before understanding the concept of a circle, let us know about circle.

Circle  

Definition: A circle is a collection of all the points in a plane, whose all points are same distance from a fix point, is called  “Circle”.

A circle named by its centre. Thus, this circle is called circle A. It’s centre is at point A.

The fixed point is called the centre of the circle, and the distance between centre and any point on the circle is called the radius of the circle.

Tangent to a Circle

A straight line that intersects the circle, at only one point is a “Tangent”.

The point where straight line intersects the circle is called the point of “Tangency.

Theorem:

The tangent at any point of a circle is perpendicular to the radius through the point of contact.