TUTORIALS
How to calculate land area at site
This is another useful presentation from L & T - Learning Technology. In this construction video, he will teach you how to calculate land area at site.
The Solution is Heron’s Formula: If there is a triangle having three sides (a, b and c), and if you know the measurement of the three sides, then
Area = 
Where s is semi perimeter
And s = (a + b + c)/2
Let’s suppose there is a land having irregular shape and we need to find the area of the land.
In triangle ABD
AB (a) = 3 m
BD (b) = 4 m
AD (c) = 5 m
S = a + b + c /2 = (3 + 4 + 5)/2 = 6 m
Area = 
In triangle BCD
BC (a) = 3 m
CD (b) = 3 m
DB (c) = 4 m
S = (3 + 3 + 4)/2 = 5 m
Area = 4.47 m2
In triangle ADE
Area = 3.8 m2
Total area = 6 + 4.47 + 3.8 = 14.27 m2
To get more details, go through the following video tutorial.
Lecturer: L & T - Learning Technology
