In a arcade game, the "monster" is the shaded sector of a circle of radius 3 cm, as shown in the figure. The missing piece (the mouth) has a central angle of 60 degrees. What is the area of the monster in cm^2
since 60 is 1/6 of 360, the mouth is 1/6 of the circle.
You now have just 5/6 of the circle.
I'm sure you know how to find the area of 5/6 of a circle, no?posted by Steve