i) The centre of a circle lies in interior of the circle.
ii) A point, whose distance from the centre of a circle is greater than its radius lies in exterior of the circle.
iii) The longest chord of a circle is a diameter of the circle.
iv) An arc is a semi-circle when its ends are the ends of a diameter.
v) Segment of a circle is the region between an arc and chord of the circle.
vi) A circle divides the plane, on which it lies, in three parts.