Answer:
The area of the rectangle is 42 units^2
Step-by-step explanation:
we know that
The area of rectangle is equal to

In this problem
AB=DC
BC=AD
see the attached figure with letters to better understand the problem
we have that

the formula to calculate the distance between two points is equal to

we have the points

<em>Find out the distance BC</em>
we have

substitute in the formula



<em>Find out the distance AB</em>
we have

substitute in the formula



<em>Find out the area</em>

we have


substitute
