Question

What is the length of DD'?

Answer 1

The length of DD' is 5.39 units.

Answer 2

The length of DD' is
`√(29)` or 5.39 units.

Explanation:

The distance formula is

`Distance=√((x_2-x_1)^2+(y_2-y_1)^2)`

From the given figure it is clear that the coordinates of D are (2,0) and coordinates of D' are (7,2).

Using distance formula we get

`DD'=√((7-2)^2+(2-0)^2)`

`DD'=√(25+4)`

`DD'=√(29)`

`DD'\approx 5.39`

Therefore the length of DD' is
`√(29)` or 5.39 units.