 Hello and welcome to the session I am Deepika here. Let's discuss a question which says proof that the tangents run at the ends of a diameter of a circle of parallels. Now we know that a tangent to a circle that intersects a circle at only one point. So this is a key idea behind that question. We will take the help of this key idea to solve up a question. Let's start the solution. We are given a circle with center O and diameter AC. Let R be tangents drawn ends of a diameter of a circle. Therefore AB is perpendicular to OA perpendicular to OC because the tangent point of a circle is perpendicular. So the point of contact AB is perpendicular to OA and CD is perpendicular to OC implies AB is perpendicular to AC and CD is perpendicular to AC. Similar to the same given AB is parallel to CG. We have proved that the tangents drawn at the ends of a diameter of a circle are parallel. I hope the solution is clear to you. Bye and take care.