Question

activity 23 : To find the number of tangents from a point to a circle. .

Answer 1

Answer:

If possible, Let PT and PT' be two tangents at a point P of the circle. Now, the tangent at any point of a circle is perpendicular to the radius through the point of contact. This is possible only when PT and PT' coincide. Hence, there is one and only one tangent at any point on the circumference of a circle.