Question 453409
find the distance between the first  two points.
The y's are the same.
the distance between the x's is -.1 and -7.9
7.8 width
the distance between the first and the third is 6.8 and -3.4

since they are opposite signs we add them
3.4 and 6.8
10.2 length
length times width
so the area is 7.8*10.2