Question

Find the distance of a point (12 , 5) from another point on the line x = 0 whose ordinate is 9.

Answer 1

Point on the line x = 0 lies on given its ordinate is 9 .

∴ point is P (0 , 9)

Let the point (12 , 5) be A.

AP = `sqrt ((12 - 0)^2 + (5 - 9)^2)`

`= sqrt (144 + 16)`

`= sqrt 160`

`= 4 sqrt 10` units