A tangent to a circle is a line that intersects the circle at only ________.
Which of the following statements is not true ?
(a) A tangent to a circle intersects the circle exactly at one point.
(b) The point common to the circle and its tangent is called the point of contact.
(c) The tangent at any point of a cricle is perpendicular to the radius of the circle through the point of contact.
(d) A straight line can meet a circle at one point only.
Fill in the blanks:
(i) A tangent to a circle intersects it in _______ point (s).
(ii) A line intersecting a circle in two points is called a __________.
(iii) A circle can have __________ parallel tangents at the most.
(iv) The common point of a tangent to a circle and the circle is called ____.