A triangle is a closed figure having 3 sides. The sum of internal angles of a Triangle is 180 Degrees.

Triangles are classified into these following types:

• 1) Equilateral Triangle : If all sides of a triangle are equal then it is called an Equilateral Triangle. The internal angles of an Equilateral Triangle are equal and measure 60 Degrees.
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2) Isosceles Triangle : If any two sides of a Triangle are equal then it is an Isosceles Triangle. The angles made by the Equal sides with the Unequal side would be Equal. 

3) Right Angled Triangle : If any angle of a Triangle is equal to 90 Degrees then it is a Right Angled Triangle.

4) Scalene Triangle : If all the sides of a Triangle are Unequal then it is called a Scalene Triangle.

5) Obtuse Angled Triangle : If any angle of a Triangle is Obtuse (more than 90 Degrees) then it is an Obtuse Angled Triangle.

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