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I need some help please ​

I need some help please ​-example-1

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Answer: 6

Explanation:

Since the 3 semicircles are identical, we know that each semicircle has a diameter of 4, meaning they each have a radius of 2.

We can use the fact that (arc length of semicircle) = (pi)(r) to get the arc length of each to be 2pi.

Meaning 2pi + 2pi + 2pi = 6pi.

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