1. 1-3 Measuring segments

2. Distance Space between 2 numbers on a number line
The absolute value of the difference of 2 coordinates
Examples:
Find the distance between 1 and 4.
Find the distance between -2 and 3.

3. Example
What is ST? 12

4. TWAP!

5. Segment Addition Postulate
If B is between A and C, then AB + BC = AC
Example: Given RS = 3x, ST = 12 – x, and RT = 24, find x. R S T

6. Example

7. Congruent Segments
Lengths are equal Segments are congruent
Notice the “tick marks”. That means they are congruent

8. Example

9. Midpoint
Midpoint – a point that divides a segment into two congruent segments.
Segment Bisector – a point, line, ray, or other segment that intersects a segment at its midpoint

10. Example

11. TWAP—(Part “a” is from the last example)

12. Homework
Pg # 1 – 4, 8 – 22 all, 37 – 38