A paralallogram with a perimeter = 13 units can be made to "lean" over until its area becomes 5 square units.
Also:
A rectangle with a long side of 5.608495283 and a short side of 0.8915047169 will have a perimeter of 13 units and an area of 5 square units.
Also:
An isosceles triangle with say 2 legs of 5.5943 and the 3rd leg of 1.8114 will have a perimeter of 13 units and an area of 5 square units.
So the answer is that there are many shapes that will satisfy the perimeter and area given.
You can have a regular polygon with n sides where the length of each side is 13/n units. For example, a triangle with sides of 4.33... units, or a square with sides of 3.25 units etc. Or you can have irregular polygons - a triangle with sides of 4,4 and 5 units, etc.
56 apex
Perimeter = 6*13 = 78 units
There are: 13*9 = 117 square units
13*9 = 117 square units
You can have a regular polygon with n sides where the length of each side is 13/n units. For example, a triangle with sides of 4.33... units, or a square with sides of 3.25 units etc. Or you can have irregular polygons - a triangle with sides of 4,4 and 5 units, etc.
43
Perimeter = 4*13 = 52 units of measurment
It is an isosceles triangle with a perimeter of 26+(4 times square root of 13) linear units and an area of 78 square units
56 apex
Perimeter = 6*13 = 78 units
There are: 13*19 = 247 square units
There are: 13*9 = 117 square units
There are: 13*19 = 247 square units
13*9 = 117 square units
There are: 13*9 = 117 square units
13*9 = 117 square units