Question

`A(-2, -1), B(2, 2), C(-1, -4), D(3,-1)`. What is the length of `AB` and `CD`?

Answer 1

`AB=5`
`CD=5`

Explanation:

Given `A(-2, -1)` and `B(2, 2)` and `C(-1, -4)` and `D(3, -1)`

Distance `AB`

`AB=sqrt((2--1)^2+(2--2)^2)=sqrt(3^2+4^2)=sqrt(9+16)=sqrt25=5`

`CD=sqrt((-1--4)^2+(3--1)^2)=sqrt((-3)^2+4^2)=sqrt(9+16)=sqrt25=5`

God bless....I hope the explanation is useful.