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Contents Lesson 1-1Points, Lines, and Planes Lesson 1-2Linear Measure and Precision Lesson 1-3Distance and Midpoints Lesson 1-4Angle Measure Lesson 1-5Angle Relationships Lesson 1-6Polygons

Lesson 2 Contents Example 1Length in Metric Units Example 2Length in Customary Units Example 3Precision Example 4Find Measurements Example 5Congruent Segments

Example 2-1a Find the length of. The long marks are centimeters, and the shorter marks are millimeters. There are 10 millimeters for each centimeter. Answer: is about 42 millimeters long.

Find the length of. Example 2-1b The ruler is marked in centimeters. Point R is closer to the 5-centimeter mark than to 4 centimeters. Answer: is about 5 centimeters long.

Example 2-1c Answer: 18 mm a. Find the length of

Example 2-1d Answer: 2 cm b. Find the length of

Example 2-2a Find the length of. Each inch is divided into sixteenths. Point E is closer to the 3-inch mark. Answer: is about 3 inches long.

Find the length of. Example 2-2b Each inch is divided into fourths. Point G is closer to the -inch mark. Answer: is about inches long.

Example 2-2c a. Find the length of. Answer: in.

b. Find the length of. Example 2-2d Answer: in.

Example 2-3a Find the precision for inches. Explain its meaning. Answer: The precision is inch. The measurement could be inches to inches. The measuring tool is divided into -inch increments. Thus, the measurement is precise to within inch.

Example 2-3b Find the precision for 15 millimeters. Explain its meaning. Answer:The precision is 0.5 millimeter. The measurement could be 14.5 millimeters to 15.5 millimeters. The measuring tool is divided into millimeter increments. Thus, the measurement is precise to within (1) or 0.5 millimeter.

Example 2-3c Answer: The precision is 0.5 millimeter. The measurement could be 87.5 millimeters to 88.5 millimeters. Answer: The precision is inch. The measurement could be inches to inches. PRECISION Find the precision for each measurement. Explain its meaning. a. 88 millimeters b.

End of Lesson 2

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