Fill in the blanks:
(i) Tangent at any point of circle is perpendicular to …… passing through point of contact.
(ii) There are exactly ……. tangents to a circle through a point lying outside the circle.
(iii) Tangent and common point of circle are called ………… .
(iv) There is no common point on line and circle. In such condition line in respect to circle is …….
