Angle & Types of angles

What is Triangle?

Triangle is a closed figure.

Triangle has three sides and three vertices.

Triangle has three angles. Sum of all three angles are equal to 180 degree (180^o)

This triangle can be represented as ABC. A, B and C are vertices of the triangle.

Triangles can be classified based on their sides and angles.

Types of Triangles basis on their sides

Equilateral Triangle

If all three sides of a triangle are euqal then it is called equilateral triangle.

Each angle of a equilateral triangle is 60 degree (60^o)

Isosceles Triangle

If any two sides of a triangle are euqal then it is called isosceles triangle.

Scalene Triangle

If all three sides of a triangle have different lengths then it is called scalene triangle.

Types of Triangles basis on their angles

Right-angled Triangle

If one angle is a right angle (90^o) then it is called right-angled triangle

Acute-angled Triangle

If all angles of a triangle is acute ( less than 90^o) then it is called acute-angled triangle

Obtuse-angled Triangle

If one angle of a triangle is Obtuse ( greater than 90^o and less than 180^o ) then it is called obtuse-angled triangle.