Question 3(a):
Draw any circle and mark: Its centre
The centre of a circle is the point which is at equal distance from the points on the circle.
In the above figure, O is the centre of the circle.
Question 3(b):
Draw any circle and mark: A radius.
Question 3(g):
Draw any circle and mark:
a point in its exterior
Question 3(f):
a point in its interior
Question 3(c):
Draw any circle and mark: A diameter.