Question 281292
The area of a triangle is 1/2*base*height.
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b = base = (x+1) ft
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h = height = 8x ft
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Area = 1/2*(x+1)*8x ft^2
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A = 1/2(8x^2+8x) ft^2
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A = 4x^2 + 4x ft^2
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A = 4x(x+4) ft^2
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Done