Question

In the figure if angle CoD=60°,OC=1cm and OB=4cm.Find the area of shaded region

Answer 1

area of sector COD - area of sector AOB
60/360*πR^2 - 60/360*πr^2
π/6(R^2-r^2)
π/6(100-16)
π/6(84)
22/7*14
22*2
44sq. cm