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Given that all the circles have equal radius of 10 cm, what is the area of the shaded blue part?

 

 Dec 1, 2019
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Here is how I did it:

 

Draw a square around a green circle in which the circle is perfectly inscribed inside the square.

 

Find the area of the square, and the area of the circle.

 

Subtract the area of the circle from the area of the square. The number you get is equal to the area of the central blue part in the picture of your problem.

 

Then find the area of the blue circle.

 

Add those values together, and that should be your answer.

 Dec 1, 2019

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