There is no defining characteristic for the set. Provided they meet certain conditions, there is an infinite number of possibilities.
Put the arrow of time in reverse: Take a parallelogram. Cut it up into 7 shapes. What set of shapes do you end up with? Obviously these 7 shapes can be combined to form a parallelogram. Now try different cuts. Then different parallelograms.
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Turn the 7 to form an angle with the other 7. It shapes a triangle.
It depends on the 7 shapes that you start with.
A parallelogram is a "sat-on" rectangle; opposite sides are equal in length → perimeter = 7 + 11 + 7 + 11 inches = 36 inches.
The area of a parallelogram is calculated by multiplying the length of the base by the height. In this case, the base is 3 feet and the height is 7 feet. Therefore, the area of the parallelogram is 3 feet * 7 feet = 21 square feet.
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