Answer:
11 units
Step-by-step explanation:
-Let (-2,-1) be A,(-2,3) be B and (5,3) be C
- We notice that AB is a a vertical line parallel to the y-axis and it's length is the sum of AB's y co-ordinates:
Length AB= 3+1=4
-Also, we notice that BC is a horizontal line parallel to the x-axis. It's length is the sum of the BC's x-coordinates(length is always positive, ignore signs);
Length BC=2+5=7
Length of fence=Lengths (AB+BC)=7+4=11
Hence, the total length of the fencing that is needed to enclose the park is 11 units.
