IQ PUZZLE - Rectangle

  to shape  4 corners , in the puzzle there are  4 pieces . 
  "Everything is fine I can handle it quickly",  
 reports  the brain . Then the fun begins! 
 The brain discovers that the simple rectangle that was in the beginning 
 Not at all simple 🤯 
 How to connect the parts to a simple rectangle? 
 You will know this if you try to assemble the rectangle 
 >  Task: Arrange a rectangle of 4 parts