what is the perimeter of pqr with vertices P(-2 9) Q(7 -3) and R(-2 -3) in the coordinate plane

1) 21 units
2) 25 units
3) 34 units
4) 36 units

I am looking for help not just the answer I have others to do, thanks.

Question

what is the perimeter of pqr with vertices P(-2 9) Q(7 -3) and R(-2 -3) in the coordinate plane

1) 21 units 
2) 25 units 
3) 34 units
4) 36 units

I am looking for help not just the answer I have others to do, thanks.

directrix · Answer

The formula is attached.

However, you will need the formula only once if you sketch the points on a grid and look at them. 

Then, you can get PR from the graph as well as RQ.

Click on the blue DRAW tab below and sketch the points. Okay?  @Iamhim

anonymous · Answer

Thanks so much :)

directrix · Answer

Glad to help. If you post what you get for the perimeter, we can compare answers. Okay?