Math CentralQuandaries & Queries


Question from shrestha, a parent:

Two concentric circles have radii of 14 cm and 7 cm respectively. Find the area of space between them.


I drew a diagram of what you described.


What is the area of the large circle? Now cut a hole in the circle where the hole is a circle with the same center as the larger circle but with a radius of 7 cm. What is the area of the circle you removed? What is the area of the region remaining, the green region in my diagram?


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