Sometimes we may need to know the area of any land or plot for various reasons such as buying, selling of land, or constructing house/building etc. In this article, I will explain how to calculate land area or plot area for a site.

Area Formula For Different Shapes

But for complex-shaped land, you cannot easily calculate the area. In that case, we use HERON’s Formula which is given below:

Where S = Perimeter of the triangle

S = (a + b + c)/2

a = Distance of AB

b = Distance of BC

c =  Distance of AC

Let’s take an example

First of all, divide the land area into minimum possible no. of the triangle. Then measure all the required distance (like AB, AC, AE etc) by using a tape or chain.

1-  For △ ACD

AC = 10 feet.

CD = 12 feet.

AD = 14 feet.

S = (a + b + c)/2 = (10 + 12 + 14)/2 = 18 feet.

2- For △AED

AD = 14 feet.

AE = 14feet.

DE = 12 feet.

S = (a + b + c)/2 = (14+14+12)/2 = 20 feet.

3- For △AEB

AB = 16 feet.

BE = 12 feet.

AE = 12 feet.

S = (a + b + c)/2 = (16 + 12 + 12)/2 = 20 feet.

Total Area Of Land = 58.78 + 75.89 + 71.55 = 206.22 ft²

Note

This method does not give appropriate result for curve-shaped area, for curve-shaped area we need to use definite integral method.

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