Mathematics

Theorems on lines and angles

रेखाओं और कोणों के प्रमेय

In this Class 9 Mathematics topic from the chapter Lines and Angles, students study the key relationships formed when lines intersect or when a transversal crosses parallel lines. They learn to understand and apply results involving linear pairs, vertically opposite angles, corresponding angles, alternate interior angles, and co-interior angles. The topic develops skill in reading diagrams, proving angle relationships, finding unknown angles, and presenting each solution with clear mathematical reasoning.