# How To Calculate Area of Land Or Plots That Are Irregular In Shape

Table of Contents

In this article, we will discuss the way to calculate area of land.

** 1. Introduction **

If you are a surveyor or the owner of the land you wish to know the area of land. If the land is square rectangular, triangular then we can quickly calculate the area of land utilizing simple geometrical formula.

All plots of land are not available in fixed geometrical shapes like a triangle, rectangle, or square. So, we usually have to face many difficulties to determine the area of these types of land that are not in fixed geometrical shape.

** 2. Triangular Land **

These types of land are not found commonly, but it does not mean that it doesn’t exist you will have to face this problem. These types of lands are seen at the corner of the road end at a turning point.

** Numerical **

Solution:-

Let, Given side of triangle be,

(AB) = (a) = 20 meter

(AC) = (b) = 18 meter

(AB) = (c) = 15 meter

Area of scalene triangle interms of three sides,

Area of triangle (A)=** √s(s-a)(s-b)(s-c)**

where,

s= semi-peremeter

a= Length of first side

b= length of second side

c= length of third side

We have,

So, at first calculate semi perimeters (s) = (a+b+c)/2 = (20+18+15)/2 = 26.5 m.

**The Semiperimeter of the triangle is half of its perimeter i.e (sum of their sides).**

Now using the above formula we get,

Area of triangular land (A)** = √26.5(26.5-20) (26.5-18) (26.5-15)**

**A= 129.76 m ^{2}**

We can determine the area of land which is in a triangular shape. now let us determine the area of rectangular plots of land.

** 3. Rectangular Land **

These types of land are usually available in all places. Those land in which one side is equal to their opposite side and another side is equal to another side are known as rectangular land.

It’s all sides are perpendicular to each other i.e 90 degrees with each other.

** Numerical **

The solution, Here in the figure two sides are 12 meters and two sides are 6 meters.

so, let **Length (L)** = 12 meter and **Breadth (B)** = 8 meter

We have,

So, Using the above formula we get,

**Area = L X B = (12 X 8) = 96 m ^{2}**

Hence, in this way, we can calculate the area of land which is in a rectangular shape. now let us calculate the area of square plots of land.

** 4. Square Plots or Land **

These types of land are also commonly seen in all places. You will see the shape of this land majorly and nearly in rectangular or in square shape. The sides of land whose all sides are equal are known as square land.

It’s all sides are perpendicular to each other i.e 90 degrees with each other.

** Numerical **

The solution, Here in the figure have all sides equal and 10 meters.

so, let **Length (L)** = 10 meter

We have,

By using the formula,

Area of Land (A) = (10 X 10 ) m^{2} = **100** **m ^{2}**

Hence, in this way, we can calculate the area of land which is in square in shape. now let us calculate the area of trapezium plots or land.

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** 5. Trapezium land **

This type of land can be seen as either regular or irregular.

** A) Land having two side parallel to each other **

These types of land are seen at the side of the road edge and may be prepared artificially for various aims. In this type of land two sides are parallel to each other but the other two sides are not parallel.

We can also determine the area of above land by dividing land into two parts in rectangle and triangle which is **show in figure.**

After that you can again use above formula of square and triangle to calculate each other and calculate the total area.

** B) Land having no any side parallel to each other **

This type of land is majorly available in different places (state and country). This is irregular land. In these types of land, all sides vary from each other. and also they have various angles with each other.

** Numerical **

**Solution,**

To calculate the area of land of these types is very quick and easy. To calculate the area of these types of land, first of all, plot 4 pegs or ranging rods at all corners of the land. After that take measurements of all sides of the land by using tape.Don’t forget to take the measurement of any one of the diagonal plots.

Now, you can watch in the figure, total land has been separated into two parts with that blue line diagonals and they are triangles in shape.

Now, let us move on to calculation,

In triangle ABD,

**let, BD (a) = 5 meter, AD (b) = 3 meter, AB (c) = 4 meter**

Again we have,

where, **S = (a+b+c)/2 = (5 + 3 + 4)/2** = 6 meter.

So, Putting all values we get the Area of triangle ABD,

**A _{1}= √6(6-5)(6-3)(6-4)**

A_{1} = 6 **m ^{2}**

In the same way, for **triangle** BDC,

**let, DC (a) = 13 meter, BC (b) = 12 meter, BD (c) = 5 meter**

where, we have **(S) = (a+b+c)/2** = **(13 + 12 + 5)/2** = 15 meter.

So, putting all value we get Area of **triangle** BDC,

A_{2}= √ 15(15-13)(15-12)(15-5)

= **30** **m ^{2}**

Hence total are of land become,

= Area of triangle ABD and triangle BDC

= A_{1} + A_{2}

= (6 + 30) **m ^{2}**

= **36** **m ^{2}**

Hence, in this way, we can determine the area of land which is irregular in shape.

Civil Engineer & CEO of Naba Buddha Group