A pool cover tarp is 27 feet wide. What is the width of the pool cover in yards?

9 yards

Step-by-step explanation:

there are 3 feet in a yard.

27/3 = 9 yards

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap