Question

Three corners of a rectangular dog park are located at (-2,-1), (-2,3), and (5,3) on a coordinate plane. What is the total length of the fencing that is needed to enclose the park?

Answer 1

22 units

Explanation:

The fourth coordinate is (5,-1)

then find the fencing length which is 22 units

Answer 2

11 units

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.