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  • Centroid of a Triangle
  • What is the Centroid of a Triangle?
  • Centroid of Triangle Formula
  • Key Properties of the Centroid:
  • Difference Between Orthocentre and Centroid of Triangle
  • Difference Between Incentre and Centroid of Triangle
  • Examples involving finding the centroid of a triangle
    • Solution:
    • Solution:
  • Practice Questions
  • Where Do We Use This in Real Life?
  • FAQs: Centroid of a Triangle
maths /
Centroid of a Triangle: Definition, Formula & Real-World Applications
maths /
Centroid of a Triangle: Definition, Formula & Real-World Applications

Centroid of a Triangle: Definition, Formula & Real-World Applications

By rohit.pandey1

|

Updated on 21 Jun 2025, 16:01 IST

Centroid of a Triangle: Definition, Formula & Real-World Applications: Discover the centroid of a triangle, its formula, derivation, and real-world applications in engineering, physics, and daily life. Learn step-by-step problem-solving techniques.

Centroid of a Triangle

Consider using the tip of your finger to balance a triangle piece of cardboard. The centroid of the triangle is where it balances perfectly! This fundamental geometric idea is essential to architecture, engineering, and physics because it helps identify the centre of mass in a variety of constructions. The following topics will be covered in this article:

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  • What is a centroid?
  • What is the formula used to calculate centroid?
  • What connections exist with other triangle properties?
  • Where in real life the centroid of a triangle is used?

What is the Centroid of a Triangle?

  • The centroid of the triangle is formed by the intersection of three triangle medians.
  • It is one of the four points of concurrency in a triangle.
  • Median, in a triangle, is a line that joins a side's midpoint to the opposite vertex of the corresponding side.

Centroid of Triangle Formula

Only by knowing the coordinates of the triangle's vertices can we determine the centroid's coordinates. The triangle's centroid C can be found using the following formula:

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C(x, y) = ( (x1 + x2 + x3) / 3 , (y1 + y2 + y3) / 3 )

where,
x1, x2, and x3 are the 'abscissas' of the vertices of the triangle;
y1, y2, and y3 are the 'ordinates' of the vertices of the triangle.

Centroid of a Triangle: Definition, Formula & Real-World Applications

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Key Properties of the Centroid:

  • It splits each median into a 2:1 ratio, with the longer part stretching from the vertex to the centroid.
  • It is always located inside the triangle.
  • It stands for the centre of gravity of the triangle.

Difference Between Orthocentre and Centroid of Triangle

OrthocentreCentroid
Point of intersection of the altitudes.Point of intersection of the medians.
May be located outside the triangleAlways located inside the triangle.
Orthocentre does not divide the 
altitudes in any specific ratio
Centroid divides the medians into a 
2:1 ratio

Difference Between Incentre and Centroid of Triangle

IncentreCentroid
Point of intersection of the angle 
bisectors.
Point of intersection of the medians.
Always located inside the triangleAlways located inside the triangle.
Incentre does not divide the angle 
bisectors in any specific ratio
Centroid divides the medians into a 
2:1 ratio

Examples involving finding the centroid of a triangle

Example 1: If the coordinates of the vertices of a triangle are given as (1,3), (3,5), and (2,4), find the position of the centroid of the triangle.

Solution:

To find the centroid of a triangle, the given parameters are:
(x1, y1) = (1,3)
(x2, y2) = (3,5)
(x3, y3) = (2,4)
Using the centroid formula:
The centroid of a triangle = C(x, y) = ( (x1 + x2 + x3) / 3 , (y1 + y2 + y3) / 3 )
= ( (1+3+2)/3 , (3+5+4)/3 )
= ( 6/3 , 12/3 )
= (2, 4)
Answer: The centroid of the triangle is (2, 4).

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Example 2: Determine the centroid of a right-angled triangle using the centroid formula, if the vertices of the triangle are (0,6), (6,0), and (0,0).

Solution:

To find the centroid of a triangle, the given parameters are:
(x1, y1) = (0,6)
(x2, y2) = (6,0)
(x3, y3) = (0,0)
The centroid of a triangle = C(x, y) = ( (x1 + x2 + x3) / 3 , (y1 + y2 + y3) / 3 )
= ( (0+6+0)/3 , (6+0+0)/3 )
= ( 6/3 , 6/3 )
= (2, 2)
Answer: The centroid of the triangle is (2, 2).

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Practice Questions

Test yourself with these problems:

  1. Find the centroid, where A(4,3), B(0,0) and C(2,3) are the vertices of a triangle.
  2. The vertices of a triangle are (1,2), (h,-3), and (-4, k) and the centroid of the triangle is (5,-1). Find the values of h and k.
  3. A triangle has the centroid (-1,-2) and co-ordinates of its two vertices (4,6) and (-8,-12). Obtain the co-ordinates of the third vertex of the triangle.

Where Do We Use This in Real Life?

  • Architecture & Engineering: Determines the center of mass in bridges and buildings.
  • Physics: Helps locate the center of gravity in objects.
  • Robotics & AI: Used in path planning and object balance detection.
  • Computer Graphics & Animation: Helps in rendering realistic motion for 3D models.

A basic idea in geometry, the centroid of a triangle has real-world uses in computer science, engineering, and physics. Comprehending its characteristics facilitates the construction of sturdy buildings, the determination of center of mass, and the resolution of practical issues.

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FAQs: Centroid of a Triangle

Is it possible for the centroid to be outside the triangle?

No, regardless of the triangle's shape, the centroid is always inside it.

What is the relationship between the centroid and the center of gravity?

The centroid, which stands for the center of mass of a uniform triangular shape, is the balancing point.

Is the triangle divided into equal sections by the centroid?

Yes! The triangle is divided into three equal-area smaller triangles by the centroid.

Whether centroid formula can be applied to 3D shapes?

Yes, tetrahedrons and other geometric solids use a similar methodology.

What distinguishes the incenter from the centroid?

The intersection of angle bisectors is the incenter, while the intersection of medians is the centroid.

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