Construction 3 : To construct the tangents to a circle from a point outside it.
- Draw a circle with centre O & Take a point P outside circle.
- Join PO and bisect it. Let M be the midpoint of PO.
- Taking M as centre & MO as radius, draw circle. Let it intersect the given circle at Q and R.
- Join PQ and PR. PQ and PR are required 2 tangents