



 
Hi John, I reproduced the drawing you sent.
You have a choice to make because there is more than one answer. I redrew the top three parcels and labeled some lengths, in feet.
I want to concentrate on one of the parcels, the one shaded green. If x and y are such that this parcel has an area of one acre then the lot beside it will also have an area of one acre leaving one acre for the parcel with a pentagon shape. The green parcel has the shape of a trapezoid and the area of a trapezoid is the average of the lengths of the parallel sides times the distance between the parallel sides. Thus if this parcel has an area of one acre (43560 square feet) then Simplifying this equation gives
Thus if you decide on a value for x then y is determined by y = 132  x and each of the three parcels has an area of 1 acre. Penny  


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