Three corners of a rectangular garden in a park are located at (2, 3), (–1, 3), and (–1, –1) on a coordinate plane. what is the perimeter of the garden?

I graphed it. This is to avoid confusion and to understand the problem clearly.

Given:
1st corner   : 2,3
2nd corner : -1,3
3rd corner  : -1,-1
4th corner  : ? ⇒ 2,-1

Length is 4 ; Width is 3

Perimeter of a rectangle = 2(L + W)
P = 2(4 + 3)
P = 2(7)
P = 14

The perimeter of the garden is 14.