1. Linear Measure and Precision
Section 1-2

2. refers to the segment refers to the length of A C
segment – a part of a line that consists of 2 points, called endpoints, and all the points between them A C
refers to the segment
refers to the length of

3. Measuring Line Segments
Unlike a line, a line segment, or segment, can be measured because it has two endpoints. The length of a segment is only as precise as the smallest unit on the measuring device.
The precision of any measurement depends on the smallest unit available on the measuring tool. The measurement should be precise to within 0.5 unit of measurement.

4. Betweenness of Points c a n
For any two real numbers a and b, there is a real number n between a and b such that a < n < c.
Point n is between points a and c iff a, n, and c are collinear and an + nc = ac c a n

5. Constructions
Constructions are methods of creating geometric figures without the benefit of measuring tools.
Generally, only a pencil, straightedge, and compass are used in constructions.

6. Probability and Segment Measure
Probability (P) of an event =
The probability that a point randomly selected on the number line is contained in is
2 mm
6 mm
2 mm A B C D