 Hello friends welcome to the session, I am Alka and let's discuss triangles. Our given question is say which pairs of triangles in figures 6.34 are similar. Write the similarity criteria used by you for answering the question and also write the pairs of similar triangles in the symbolic form. Here we are given two triangles A, B, C and P, Q, R with the sides A, B2, AC3, BC2.5, P, R5, Q, R4, P, Q, 6. Now let's discuss the similarity of these two triangles. Now let's start with the solution in triangle A, B, C and triangle P, Q, R, we see that A, B upon Q, R is equal to BC upon P, R is equal to AC upon P, Q. From the figure we see that A, B is equal to 2, Q1 is equal to 4, BC is equal to 2.5, P, R is equal to 5, AC is equal to 3 and P, Q is equal to 6. This is equal to 1 upon 2. We see that all these sides are proportional to each other. Now since we know from SS's criteria of similarity, if the sides of the triangle are proportional to each other then the corresponding angles are also equal. Therefore, by SS's criteria of similarity, we find that triangle A, B, C is similar to triangle P, Q. So we can say that yes they are similar to each other by SS's criteria of similarity and this can be written as triangle A, B, C is similar to triangle P, Q, R. So hope you understood this solution and enjoyed the session. Goodbye and take care.