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A rectangle is removed from the right hand corner of a square board. What is the area of the remaining board in square feet?

 

 Apr 14, 2020
 #1
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12*12 - 10*4 = 144 - 40 = 104ft2

 Apr 14, 2020
 #2
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Since the board is a square the total area of the shape is 12*12 = 144. we know that the side length of the rectangle that was taken out was 10 because 2 feet of the board still remain. we know the height of the board taken out is 4, by looking at the picture, so the boards area is 144 - 40 = 104

 Apr 14, 2020

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