Answer:
The distance formula
Explanation:
This was kind of vague, but I'll try my best.
You can use the distance formula! It is basically the pythagorean theorem.
Here's the steps,
1. draw a right triangle from the corners. If you have graph paper, this should be relatively easy.
2. locate the hypotenuse, that is the distance.
3. next use the pythagorean theorem/ distance formula (same thing)
4. Except, instead of a and b and c, replace them with
(Change in x)²+(change in y)²= distance²
Now plug in the values
Now you're done!