Fill in the blanks:
(i) An arc is the part of the .......,
(ii) Diameter of a circle bisects ......,
(iii) The part of the circumference greater than the semi-circle is called........
(iv) Sector of a circle is its region bounded by .........,
(v) The segment of a circle is the region bounded by ........,
(vi) A tangent of a circle meets the circle at .......,
(vii) The number of tangents that can be drawn through a point on its circumference ........,
(viii) The number of tangents that can be drawn through a point outside the circle is ......