If you cut off one corner of a quadrilateral, how many of them will it have?

In order to solve this problem, you need to determine how many corners the quadrilateral will have when cutting off one corner:

1) Using an abstract representation, we can understand that when one corner is cut off, two additional ones are formed.

2) Since the remaining 3 corners of the quadrilateral remained intact, the number of corners in the new figure is already 3 old corners + 2 newly formed ones. Total 3 + 2 = 5 angles.

Therefore, our answer is: The quadrilateral will have 5 corners.