How to draw a tangent to a circle through a point on the circle?

If a line has only one common point with a circle, then in this case it is called a tangent line. In order to draw it, it is necessary to draw its radius to a point lying on a circle. Then, perpendicular to the radius, that is, at an angle of 90 °, draw a straight line through this point, which will be tangent, and the point on the circle will be the tangent point.