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PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoLet's learn the types of triangle:
Triangles can be classified based on its sides as well as its angles.
Types of triangles based on its side lengths are as follows.
- Equilateral triangle
- Isosceles triangle
- Scalene triangle
A triangle is an equilateral when all its sides are equal in length.
![Theory3.1.png](https://resources.cdn.yaclass.in/a2a2e3e3-ed31-46b1-95bf-4e24261de809/Theory3.1-w300.png)
Example:
![Theory3.2.png](https://resources.cdn.yaclass.in/75671da2-702d-43a7-9796-352668843d7d/Theory3.2-w300.png)
In here, the sides are equal in measure \(AB=BC=CA=5\) units.
A triangle is isosceles when two of its sides are equal in length.
![Theory3.3.png](https://resources.cdn.yaclass.in/e49003b0-2c14-48cc-95a1-7283e5ee293c/Theory3.3-w300.png)
Example:
![Theory3.4.png](https://resources.cdn.yaclass.in/b566e923-0961-4c38-90f0-f1b359cc66ee/Theory3.4-w300.png)
In here, the two of the sides are equal in measure \(AB=CA=1\) unit and \(BC=√2\) units.
A triangle is a scalene when all the three sides are unequal.
![Theory3.5.png](https://resources.cdn.yaclass.in/05c2ebaa-67ba-47e6-98f1-ef8619006791/Theory3.5-w300.png)
Example:
![Theory3.6.png](https://resources.cdn.yaclass.in/51b8566d-40a5-4226-b5d2-a7f052b838d8/Theory3.6-w300.png)
In here, all the sides are unequal in measure \(AB=7.7, CA=5\) units and \(BC=9\) units.
Types of triangles based on its angles are as follows.
- Acute angled triangle
- Right angle triangle
- Obtuse angled triangle
A triangle is acute angle triangle when all the three of its angle are acute (less than 90°).
![Theory3.7.png](https://resources.cdn.yaclass.in/e689e11f-60d4-4424-8fb8-bddd60c731ea/Theory3.7-w300.png)
Example:
![Theory3.8.png](https://resources.cdn.yaclass.in/e56659f7-1025-43f9-9c1c-d0638fc1d6f3/Theory3.8-w300.png)
In here, all the three angles are less than \(90°\). That is, \(∠A=60°, ∠B=50°\) and \(∠C=70°\).
A triangle is right angle triangle when one of its angles is a right angle (90°), and the other two are acute angles (less than 90°).
Example:
![Theory3.10.png](https://resources.cdn.yaclass.in/436e21c5-9cca-4315-8ce6-4d7254804ea7/Theory3.10-w200.png)
In here, one among the angle is \(90°\), and the other two are acute. That is, \(∠A=40°, ∠B=50°\) and \(∠C=90°\).
A triangle is an obtuse angle triangle when one of its angles is an obtuse angle (greater than 90°), and the other two are acute angle (less than 90°).
![Theory3.11.png](https://resources.cdn.yaclass.in/817db509-9ba5-4360-ab91-2bd39ce851ea/Theory3.11-w300.png)
Example:
![Theory3.12.png](https://resources.cdn.yaclass.in/7c9a126d-b51f-45a8-84ad-a3df536c95df/Theory3.12-w300.png)
In here, one among the angle greater than \(90°\) and the other two are acute. That is, \(∠A=120°, ∠B=35°\) and \(∠C=25°\).