Section 2
- 1. 1.2 Linear Measure and Precision
- 2. Objective Measure segments and determine accuracy of measurement. Compute with measures.
- 3. Measure line segments Unlike a line, a line segment , or segment, can be measured because it has two endpoints. A segments with endpoints A and B can be named as or .
- 4. Read get ready for the lesson and then answer the following. What is another part of the body that is used as a unit of measure? Is a foot a customary unit or metric unit? Which system of measure uses fractions and whole numbers? Which system of measure uses decimals?
- 5. Examples Use a metric rule to draw each segment. , 42 millimeters long , 5 centimeters long
- 6. Examples Use a customary ruler to draw each segment. , 3 inches long , inches long
- 7. Precision The precision of any measurement depends on the smallest unit available on the measuring tool. The measurement should be precise to within 0.5 units of measure.
- 8. Example Find the precision for each measurement. Explain its meaning. 32 inches 15 millimeters
- 9. Calculate Measures When segments have the same measure they are said to be congruent.
- 10. Constructions Constructions are methods of creating geometric figures without the benefits of measure tools. Generally, only a pencil, straightedge, and compass are used. You can construct a segment that is congruent to a given segment. See example on page 16.