Answer:
It would be 22 units.
Explanation:
Here, I used the distance formula. You can also count manually, but that's a pain. In case you don't know, the distance formula is this:
d =

So, let's plug our numbers in.
d =

Subtract...
d =

Exponents...
d =

Add, but we'll only get 484. Then, square that...
= 22
There's your answer!