Answer:
Each subtraction expression represents the length of one leg of a right triangle with a hypotenuse of length
Explanation:
Each subtraction expression x2 - x1 or y2 - y1 represents the length of a side of a right angled triangle. These length of sides are then used to calculate the resulting hypotenuse side using the Pythagorean theorem. In this case, the resulting hypotenuse is the length calculated.