Question

What is the length of DD'?

Answer 1

Answer:

The length of DD' is $\sqrt{29}$ or 5.39 units.

Step-by-step explanation:

The distance formula is

$Distance=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

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

$DD'=\sqrt{(7-2)^2+(2-0)^2}$

$DD'=\sqrt{25+4}$

$DD'=\sqrt{29}$

$DD'\approx 5.39$

Therefore the length of DD' is $\sqrt{29}$ or 5.39 units.

Answer 2

The length of DD' is 5.39 units.