 Hi and welcome to the session. Today we will learn about classification of triangles. We can classify triangles based on their sides and based on their angles. So first of all let us classify the triangles based on sides. So first of all we have a triangle having all three unequal sides. Here this is known as a scalene triangle. So here this is a scalene triangle. In this all the sides are unequal. Next we have a triangle having two equal sides is an isosceles triangle. Here we have an isosceles triangle in which side PQ is equal to side PR. So here two sides are equal. Now a triangle equal sides is a equilateral triangle. So here we have a equilateral triangle in which all the sides are equal. That is xy is equal to yz is equal to zx. Now let us classify triangles based on angles. First of all in a triangle if each angle is less than 30 degrees then the triangle acute angled triangle. Now here in this triangle all the angles are less than 90 degrees. So that means this is an acute angled triangle. Next we have if any one angle is a right angle then the triangle right angled triangle. In this triangle this angle is 90 degrees that is a right angle. So this triangle is a right angled triangle. Now if any one angle is greater than 90 degrees then the triangle alt and obtuse angled triangle. In this triangle this is an obtuse angle that is greater than 90 degrees. So that means this is an obtuse angled triangle. Thus in this session we have classified triangles based on their sides and angles. With this we finish this session. Hope you must have understood all the concepts. Goodbye take care and have a nice day.