Question

find the area of the shaded region in the figure given below where id of the two concentric circles with Centre O are 7 cm and 14 cm respectively and angle AOC equals to 40 degree

Answer 1

Answer:

shaded= big sector-small sector

Step-by-step explanation:

r=7 ,R=14

A.T.Q

theta/360*pi r square - theta/360*pi R sruare

40/360*22/7*7*7 - 40/360*22/7*14*14

40/360*22/7[7*7 - 14*14]

40/360*22/7[21*7]

ans= 154/3

=5.1cm sq