Q11 of 36 Page 253

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

A sector subtends an angle of measure 120 at the centre of a circle having radius of 21 cm. The area of the sector is ……….. cm2.


Given radius (r)= 21 cm


angle(θ) = 120o


area of the minor sector =


=


=


= 461.58 cm2


= 462 cm2


So, option(a) is the correct answer.

More from this chapter

All 36 →
11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The area of a sector is given by the formula ….


(r is the radius and 1 is the length of an arc.)


 11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

and are the two mutually perpendicular radii of a circle having radius 9 cm. The area of the minor sector corresponding to AOB is cm2( = 3.14)


 11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

If the area and the circumference of a circle are numerically equal, then r = …………


 11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The length of an arc subtending an angle of measure 60 at the centre of a circle whose area is 616 is ……….