Lesson 1-2 Linear Measure and Precision. Ohio Content Standards:

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Presentation transcript:

Lesson 1-2 Linear Measure and Precision

Ohio Content Standards:

Estimate and compute various attributes, including length, angle measure, area, surface area and volume, to a specified level of precision.

Ohio Content Standards: Use appropriate levels of precision when calculating with measurements.

Vocabulary

Line segment:

Vocabulary Line segment: part of a line that can be measured because it has two endpoints

Use a metric ruler to draw each segment.

Draw LM that is 42 millimeters long.Draw LM that is 42 millimeters long.

Use a metric ruler to draw each segment. Draw LM that is 42 millimeters long.Draw LM that is 42 millimeters long. Draw QR that is 5 centimeters long.Draw QR that is 5 centimeters long.

Use a customary ruler to draw each segment.

Draw DE that is 3 inches long.Draw DE that is 3 inches long.

Use a customary ruler to draw each segment. Draw DE that is 3 inches long.Draw DE that is 3 inches long. Draw FQ that is 2 ¾ inches long.Draw FQ that is 2 ¾ inches long.

Vocabulary

Precision-

Vocabulary Precision- smallest unit available on the measuring tool

Vocabulary Precision- smallest unit available on the measuring tool *The measurement should be within 0.5 unit of measure.

Find the precision for each measurement. Explain its meaning.

32 ¾ inches32 ¾ inches

Find the precision for each measurement. Explain its meaning. 32 ¾ inches32 ¾ inches 15 millimeters15 millimeters

Vocabulary

Betweenness of points -

Vocabulary Betweenness of points – for any two points on a number line, there will be a least one point that lies in between them

Vocabulary Between -

Vocabulary Between- to be in the middle of something

2.6 cm 4 cm N M L

Find LM. 2.6 cm 4 cm N M L

5 5/8 in. ZYX 2 ½ in.

Find XZ. 5 5/8 in. ZYX 2 ½ in.

5x - 3 ST U7x7x

Find x and ST if T is between S and U, ST = 7x, SU = 45, and TU = 5x – 3. 5x - 3 ST U7x7x

Vocabulary

Congruent-

Vocabulary Congruent- having the same measure

Vocabulary Constructions-

Vocabulary Constructions- methods of creating geometric figures without the benefit of measuring tools

The Arial font is often used because it is easy to read. Study the word TIME shown in Arial type. Each letter can be broken into individual segments. The letter T would have two segments, a short horizontal segment, and a long vertical segment. Assume that all segments overlap when they meet. Which segments are congruent?

Assignment: Pgs all, evens, all