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Lesson 1-2

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

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Lesson 1-2

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  1. Lesson 1-2 Linear Measure and Precision

  2. Ohio Content Standards:

  3. Ohio Content Standards: • Estimate and compute various attributes, including length, angle measure, area, surface area and volume, to a specified level of precision.

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

  5. Vocabulary

  6. Vocabulary • Line segment:

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

  8. Use a metric ruler to draw each segment.

  9. Use a metric ruler to draw each segment. • Draw LM that is 42 millimeters long.

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

  11. Use a customary ruler to draw each segment.

  12. Use a customary ruler to draw each segment. • Draw DE that is 3 inches long.

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

  14. Vocabulary

  15. Vocabulary • Precision-

  16. Vocabulary • Precision- smallest unit available on the measuring tool

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

  18. Find the precision for each measurement. Explain its meaning.

  19. Find the precision for each measurement. Explain its meaning. • 32 ¾ inches

  20. Find the precision for each measurement. Explain its meaning. • 32 ¾ inches • 15 millimeters

  21. Vocabulary

  22. Vocabulary • Betweenness of points -

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

  24. Vocabulary • Between -

  25. Vocabulary • Between- to be in the middle of something

  26. L M 2.6 cm N 4 cm

  27. Find LM. L M 2.6 cm N 4 cm

  28. X Y Z 5 5/8 in. 2 ½ in.

  29. Find XZ. X Y Z 5 5/8 in. 2 ½ in.

  30. T S U 5x - 3 7x

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

  32. Vocabulary

  33. Vocabulary • Congruent-

  34. Vocabulary • Congruent- having the same measure

  35. Vocabulary • Constructions-

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

  37. 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?

  38. Assignment: Pgs. 17 - 19 12-19 all, 22-36 evens, 58-64 all

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