1. 1.2 Linear Measure and Precision

2. Objectives Measure segments and determine accuracy of measurements.
Compute with measures.
Textbook Pages

3. Important Terms
Line segment: A line segment can be measured, because it has two endpoints.
Precision: The measurement should be precise within 0.5 units of measure.
Ex: if cm is smallest unit, can come w/in ±.5 cm for precision
Ex: if mm is smallest unit, can come w/in ± .5 mm

4. Examples
Find the precision for the measurement:
1. 5 mm ½ inches

5. Important Terms
Between: A Point M is between points P and Q if and only if P,Q, and M are collinear and PM + MQ = PQ.
(Point M DOES NOT have to be a midpoint)!
Congruent: When segments have the same measure, they are said to be congruent.

6. Examples R A 2y P 21 Q B 2 2 C
Find RQ:
Find AC:

7. Congruent ( ) – items with same measure (use in geom figures instead of “=“)B E D A C

8. Worksheet Skills Practice 1-2.
Assignment
Worksheet Skills Practice 1-2.