Area of the shaded region.  http://www.flickr.com/photos/93084714@N07/8633196198/

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Take note of the formula for the area of a rectangle. 

We ahve two rectangle with width = 2cm, and length = 4cm. 

Area of those two rectangles is: 

A = 2(L*W) = 2(4*2) = 16 cm^2. 

Get the area of the rectange with lenght = 5cm, and width = 2cm. 

A = 5 * 2 = 10 cm^2

Adding the results. 

Area of the shaded region will be: 

A = 16 cm^2 + 10 cm^2 = 16 cm^2

 

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