 Hi and welcome to the session. Today we will discuss about tangents to a circle. So let us start with number of tangents from a point on a circle. We already know that there is only one tangent at a point of a circle. Now let's see that how many tangents we can draw to a circle when we have a point A outside the circle. So here we can draw two tangents AB and AC to a circle with a point outside the circle. So let us write there are exactly two tangents to a circle outside the circle. Now let's see what is the length of a tangent. The length of the segment of the tangent from the external point which is A in our case and the point of contact with the circle is called the length of the tangent from the point A to the circle. So here AB is the length of this tangent, AB is the length of this tangent. Now if I ask you to measure AB and AC then you will find an interesting fact that is AB is equal to AC. So based on this we will see an important result which is the length of tangents from an external point to a circle equal. That means according to this result AB will be equal to AC. So if we are given that the length of AB is 5 cm then using this result we can say that AC will also be equal to 5 cm. So all these tangents must be clear to you. So with this we have finished this session. Goodbye and have a nice day.