Welcome to Triangles II, where you will extend the concept of similarity to calculate areas of similar triangles. In this chapter, you will learn how the ratio of areas of two similar triangles is related to the square of the ratio of their corresponding sides.

You will also study one of the most important results in mathematics — the Pythagoras Theorem. You will state and prove the Pythagoras theorem and apply it to solve numerical problems involving right-angled triangles. This chapter strengthens geometrical reasoning and has wide applications in real-life situations, making it highly important for CBSE Board examinations.