CBSE Class 9 Math: Ten Important Questions 1. ABCD is a rhombus and P, Q, R, S are mid-points of AB, BC, CD and DA Prove that quadrilateral PQRS is a rectangle. 2. ABCD is a rectangle and P, Q, R and...
Are Particles of Matter Attract Each Other? YES, Particles of matter attract each other. Let us observe some activities, Activity: Make four groups and form a human chain Group1: The First group...