1. 1-4 Measuring Segments
(part 1)

2. Ruler Postulate
The points of a line can be put into one-to-one correspondence with the real numbers so that the distance between any two points is the absolute value of the difference of the numbers.

3. Coordinate
Position on a line

4. Congruent Segments
Segments with the same length

5. Find the length of each segment
Find the length of each segment. Tell whether the segments are congruent.

6. Midpoint
a point that divides a segment into two congruent segments. A segment, ray, line, or anything through the midpoint is said to bisect a segment.

7. Segment Addition Postulate
If three points A, B, and C, are collinear and B is between A and C, then AB + BC = AC

8. Example 1
AB = 25 Find x, AN, and NB

9. Example 2
M is the midpoint of RT. Find RM, MT, and RT.

10. Practice
EG = Find x, EF, and EG.

11. Practice
If Z is the midpoint of segment XY and XY = 27, find XZ.

12. Exit Slip Homework