Which of the following statements is NOT true?

1. If the endpoints of a segment are (3,0) and (0,3) , the length of the segment is approximately 4.24 units.

2. If the endpoints of a segment are (3,3) and (5,-5), the length of the segment is approximately 4.24 units

3. The Pythagorean theorem can be used to find the length of a segment.

4. The distance formula can be used to find the length of a segment.