## Answer :

[tex]\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}[/tex]

If you input the values, you will get:

A to B=[tex]\sqrt{13}[/tex]

B to C=[tex]\sqrt{13}[/tex]

C to D=[tex]\sqrt{13}[/tex]

D to A=[tex]\sqrt{13}[/tex]

It is a square.

Hope that helped!

~Cam943, Moderator

**Answer:**

it is a square use geogebra and you will see

**Step-by-step explanation:**