Answer: 4 cm and 11 cm.
Step-by-step explanation:
1. You can calculate the perimeter of a parallelogram as following:

Where a+b+c+d are the lenghts of the sides.
By definition the parallelogram has two pairs of parallel sides, therefore:
a=c and b=d
Then, you can calculate the perimeter as following:
2. Let's call the adjacent side
, then the other side is 2x+3.
3. Substitute values and solve for x:

4. Then the lenghts of the sides are:

The answer is 6.25 pi cm squared
Answer:
I understand your pain
Step-by-step explanation: sadge
We are given two bases as 3 and 11
altitude is 8
formula for area of trapezoid is given by

here a and b are two bases and h is height
plugging the given values we get
=56
Area of trapezoid = 56 unit square