**Distance Formula CBSE NCERT solutions Chapter 7 Exercise 7.1 Question 5**

**5**. In a classroom, 4 friends are seated at the points **A (3, 4), B (6, 7), C (9, 4) and D (6, 1)**. Champa and Chameli walk into the class and after observing for a few minutes Champa asks Chameli.** "Don't you think ABCD is a square?"** Chameli disagrees. Using distance formula, find which of them is correct.