Answer: 138.2
Step-by-step explanation: The area of the shaded reigon can be determined by finding the area of the larger circle and subtracting it by the area of the smaller circle.
The formula for the area of a circle is:
πr^2
We are given the radius of both circles with the larger one of 12 and the smaller one being 10 so we can substitute it in the equation to get:
π(12)^2 - π(10)^2 = Area of Shaded Reigon
452.39 - 314.15 = Area
Area = 138.2
Hope this Helps!