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A picture frame consists of two rectangular strips of wood, each having a width of 1 inch on all sides. If the area of the inner light gray strip is 100 , then compute the area of the outer dark gray strip in square inches.

Lightning  Oct 13, 2018
 #1
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Notice that we have four corner rectangles in the darker strip, each with dimensions of  2 x 1  = 2 unit^2

So....the total area of these  = 8 units^2

 

The other parts of the dark gray strip would be rectangles with the same dimensions as the rectangles  comprising the area of the lighter gray strip...so...their total areas  =  100

 

So...the  area of the darker gray strip  = 100 + 8  =  108 sq units

 

 Corrected answer  !!!

 

cool cool cool

 

 

 

 

 

 

 

 

.

CPhill  Oct 13, 2018
edited by CPhill  Oct 13, 2018
edited by CPhill  Oct 13, 2018
edited by CPhill  Oct 14, 2018
 #2
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Thanks so much!

Lightning  Oct 14, 2018

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