A parallelogram cannot be generalised to a convex shape with an odd number of sides.
If you put two of ANY triangle hypotenuse to hypotenuse the shape will have 4 sides (thus a parallelogram or quadrilateral).
If you take a right triangle and move it to the right of a parallelogram, it creates a trapezium.
it just doesnt exist. parallelogram is a closed shape vth opposite sides parallel adjacent angle not 90 degree. triangle is closed shape vth 3 sides.
It depends on the shape - triangle, parallelogram etc.
by 1 parallelogram and a triangle
you will get a triangle
A parallelogram is two triangle together.
I don't know about the relation in the perimeters of a triangle and a parallelogram but if a triangle is on the same base on which the parallelogram is and the triangle is between the same parallel lines of the parallelogram, then the area of the triangle will be half the area of the parallelogram. That is, area of a triangle = 1/2 area of a parallelogram if the triangle is on the same base and between the same parallel lines.
The answer depends on how the parallelogram in the triangle is constructed.
... and the shape is? A triangle? A parallelogram?
It depends on the shape. A triangle and a parallelogram with these dimensions will have different areas.