Math CentralQuandaries & Queries


Question from James, a parent:

Need to find square foot of a residential lot on a cul-de-sac. Weird triangular shape. Measurements : 126.18 170.08 138.2 48.4


You need to know more than the lengths of the sides to find the area. Your comment "Weird triangular shape." is the key. You need a way to describe the shape. Look at this response we gave to a another question to see an example of weird shapes with obviously different areas and yet the same side lengths. The example has 5 sides but you can do something similar with 4 shapes. If you know the length of a diagonal or the measure of one of the angles you can use our four-sides lot area calculator to find the area. If not, but you have a drawing of the lot, send it to us and we will see if we can find the area.


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