Answer:
6
or 24.738634
Explanation:
We can use the Pythagorean theorem to find the length of the sides. We will only need to find the length of AB and AD, as AB = DC and AD = BC.
The picture shows the Pythagorean theorem being used to find AB and AD.
AB =

AD =

Now we can find the perimeter
2(
) + 2(
) = 6