Check sibling questions



Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Ex 7.1, 1 Find the distance between the following pairs of points : (a, b), (−a, −b) Let the two points be A(a, b) & B(−a, −b) We need to find distance AB AB = √((𝑥2 −𝑥1)2+(𝑦2 −𝑦1)2) Here, x1 = x coordinate of A = a y1 = y coordinate of A = b x2 = x coordinate of B = −a y2 = y coordinate of B = −b Putting values AB = √((𝑎 −(−𝑎 ))2+(𝑏 −(−𝑏))2) = √((𝑎+𝑎)2+(𝑏+𝑏)2) = √((2𝑎)2+(2𝑏)2) = √((2𝑎)2+(2𝑏)2) = √(4𝑎2+4𝑏2) = √(4×(𝑎2+𝑏2)) = √4 × √(𝑎2+𝑏2) = 2 × √(𝑎2+𝑏2) = 2√(𝒂𝟐+𝒃𝟐)

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.