Question

)
OAB is a sector of the circle having
centre at O and radius 12 cm. If
mZAOB = 45°, find the difference
between the area of sector OAB and
sector AOB.​

Answer 1

Step-by-step explanation:

area of circle

= pi r^2

= 3.14 × 12 ×12

=452.16

area of sector

= 45°/360° × 3.14 × 12 ×12

= 1 / 8 × 3.14 × 144

= 56.52

difference = area of circle - area of sector

= 452.16 - 56.52

= 395.64 ANS.