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A rectangular picture frame is made from one-inch-wide pieces of wood. The area of just the frame is 18 square inches, and one of the outer edges of the frame is  inches long. What is the sum of the lengths of the four interior edges of the frame?

 Mar 14, 2019
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I made a frame with two pieces of slat 5" long and two pieces 4" long

 

The inside perimeter is 14" around  (4+4+3+3) 

 Mar 14, 2019

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