Answer:x=8
Step-by-step explanation:
You have to subtract 12 to 4
So x=8
6 sides, 7 length for one side
6x7 = 42 for the first one
52 for one side, has 5 sides
52x5 = 260 for the second.
Answer: A
Explanation do Pythagorean theorem and find the third side. Then do adjacent/hypotenuse.
P(7,6), Q(1,6), R(4,2)
We have PQ parallel to the x axis. We'll call that the base,
b = 7 - 1 = 6
The altitude is then the y difference h = 6 - 2 = 4
The area is 
Answer: 12 square units
In general we can use the shoelace formula for the area of any polygon given coordinates. We write the points like this:
(7,6), (1,6), (4,2)
(1,6), (4,2), (7,6)
The area is then half the absolute value of the sum of the cross products:
