# Essential formulas for finding out the area and volume in job site

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In this civil engineering article, you will learn how to determine the volume of any specific area in a construction site like quantity of pouring, quantity of cement, brickwork etc.

To perform this efficiently, you should be well versed with different types of formulas.

Area of rectangular shape (for casting, concreting work etc.) = Length x Breadth

Volume of cuboid = Length x Breadth x Height

Area of square shape = Length x Length = Length^{2}

Volume of cube = Length x Length x Height

Area of circle = πr^{2}

Volume of cylinder = πr^{2}h

Area of triangle = ½ x b x h (b = base and h = height)

Volume of triangular steps for stair = ½ x b x h x w (b = breadth; w = width)

Check the verticality of wall or column with right angle = Apply 3,4,5 methods

Details of 3,4,5 methods: In survey work, it is frequently required to specify right angles or perpendicular lines on the job site.

It can be performed with the following practical methods :-

1. The 3-4-5 method: It is applied to specify a right angle from a specific point on the base line.

2. The rope method: It is utilized to specify a line perpendicular to the base line, commencing from a point that is not situated on the base line.

### Also Read: An extensive list of formulas and equations for civil engineers

3. The single prismatic square and the double prismatic square: These are utilized to specify both right angles and perpendicular lines.

A Pythagorean triple refers to a right triangle where all the sides are integers. One of the most recognized Pythagorean triples is the 3-4-5 right triangle. 3 and 4 are the lengths of the shorter sides, and 5 is the length of the hypotenuse, the longest side opposite the right angle.

Perimeter = Add all faces

For rectangular shape = B + L + B + L

For square shape = L + L + L + L

To get more details, go through the following video tutorial.

Video Source: Civil Engineer Deepak Kumar

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