The two externally tangent circles each have a radius of 1 unit. Each circle is tangent to three sides of the rectangle. What is the total perimeter of the shaded region? Express your answer in terms of pi


 May 2, 2022

Because the circle has a radius of 1, we know the rectangle's dimensions are \(4 \times 2 \)


Note that the perimeter of the shaded region is the perimeter of the rectangle plus the perimeter of the 2 circles. 


The circumference/perimeter of the circle can be found using the formula \(2 \pi r\)


Can you take it from here?

 May 2, 2022

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