1. Fill in the blanks:
(i) The centre of a circle lies in ______ of the circle. (exterior/ interior)
(ii) A point, whose distance from the centre of a circle is greater than its radius lies in __________ of the circle. (exterior/ interior)
(iii) The longest chord of a circle is a ________ of the circle.
(iv) An arc is a ________ when its ends are the ends of a diameter.
(v) Segment of a circle is the region between an arc and ________ of the circle.
(vi) A circle divides the plane, on which it lies, in _________ parts.

To do:

We have to fill in the blanks. 

Solution:

(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 the 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.