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11-4.

Find the dimensions of the generic rectangle shown at right and write its area as a sum and a product.

Generic rectangle interior top left  

interior top right

interior bottom left  

interior bottom right

To express the area as a product, find the dimensions of the large rectangle and multiply them together. To express the area as a sum, add the tile pieces together.

Generic rectangle left edge top 

interior top left 

interior top right

left edge bottom  

interior bottom left

interior bottom right

bottom edge left

bottom edge right