3. A rectangular frame, if it is pulled into a parallelogram, its perimeter and area
Perimeter unchanged
Smaller area
Pull a parallelogram frame with a circumference of 16 decimeters into a rectangle with a circumference of 10 decimeters______ Decimeter
Pull the parallelogram frame into a rectangle, the shape has changed, but the side length data has not changed, so the perimeter of the rectangle is still 16 decimeters