What Is Sector Of A Circle

Minor sector:
A sector of a circle is called a minor sector if the minor arc of the circle is a part of its boundary
In Fig. sector OAB is the minor sector.
Major sector:
A sector of a circle is called a major sector if the major arc of the circle is a part of its boundary.
In Fig. sector OACB is the major sector.
Following are some important points to remember:
(i) A minor sector has an angle θ, subtended at
the centre of the circle, whereas a major sector has no angle.
(ii) The sum of the arcs of major and minor sectors of a circle is equal to the circumference of the circle.
(iii) The sum of the areas of major and minor sectors of a circle is equal to the area of the circle.
(iv) The boundary of a sector consists of an arc of
the circle and the two radii.