Question

Find the lenght of cd

Answer 1

Use the distance formula.

`√((x_2-x_1)^2+(y_2-y_1)^2)`

`x_2=7\\x_1=3\\y_2=-8\\y_1=-2`

`√((7-3)^2+(-8-(-2))^2)`

=
`√(4^2+(-6)^2)`

=
`√(16+36)`

=
`√(52)`

≈7.2111...

So the answer is B! Hope this helped!