Question 1198840
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The area of sector OAB is (4/3)pi cm^2.<br>
Angle AOB is 120 degrees, so the sector is 1/3 of the circle.<br>
So the area of the whole circle is 4pi cm^2; so the radius of the circle is 2 cm.<br>
Triangles ADC and BDO are congruent, so the shaded area is the same as the area of sector COB.<br>
The area of sector COB is half the area of sector OAB, which is given as being (4/3)pi cm^2.<br>
ANSWER: (2/3)pi cm^2<br>