Question 3(d):
Draw any circle and mark: A sector.
A region in the interior of a circle enclosed by an arc on one side and a pair of radii on the other two sides is called a sector.
Here, OAB is the sector of the circle.
Question 3(e):
Draw any circle and mark:
A segment
Question 3(b):
Draw any circle and mark: A radius.
Question 3(c):
Draw any circle and mark: A diameter.
Question 3(a):
Draw any circle and mark: Its centre