1. Daily Warm up Turn in “What Shape is Your Name”
Check off Hw #1 Pg. 1– Points, Lines & Planes Worksheet
Check off Materials– LAST DAY for credit.
Take Syllabus Quiz

2. 1.2 Measuring & Constructing Segments

3. a rule that is true without proof.
Core Concepts
Example 1: Using a ruler and starting at 3 cm, measure the length of the segment below.
Postulate (axiom)—
a rule that is true without proof.
Ruler Postulate(1.1)—
The distance between points A and B, written as AB, is the absolute value of the coordinates of the difference of A and B.

4. Try This #1! Find the Length of ED E D 26 -15
Try to find other examples

5. Core Concepts Construction—
a geometric drawing that uses a compass & straightedge.
Ex 2: Are the following segments congruent? If not, Construct a Segment that’s congruent for each segment.
Congruent Segments—
line segments that have the same length.
Use ______ symbol to say two segments are congruent.
Lengths are equal
Segments are congruent.
Use Ruler and Compass for EX 2.

6. Try This #2!
Find the length of segment AB and segment CD. Tell whether the segments are congruent. If not, construct a congruent segment for each on the coordinate plane.

7. If B is between A and C, then
Core Concepts
Ex 2: The cities shown on the map lie approximately in a straight line. Find the distance from Tulsa, Oklahoma, to St Louis, Missouri.
Segment Addition Postulate (1.2)—
If B is between A and C, then
AB + BC = AC

8. Try This #3! Find the length of segment HP
Write an expression for the length of the segment. H P
78 cm
15 cm
2x-1
-x-12