A square has the same area and perimeter of 16cm
No , perimeter is the measurement outside of the shape; the border. Area is the measurement of inside of the shape.
Given any shape with a given area you can another shape with the same area but a different perimeter. And convesely, given any perimeter you can have another shape with the same perimeter but a different area. And these apply for the infinite number of shapes.
Most shapes have different perimeter than area, as far as value.
they are different because perimeter is the out side of the shape and area is inside of the shape.
both include the outside of the shape
No, any shape with four sides and same perimeter will always be a square.
perimeter is when you have a shape and then you have your area and that is what is in the middle of the shape and perimeter is the edge of the shape.