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August 24, 2010

August 24, 2010. Linear Measurement. Bellringer. Put your name on your homework and pass it to the front. What is ¾ + 5/6 ?. Unlike a line, a line segment, can be measured because it has two endpoints. A segment with endpoints A and B can be name AB or BA.

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August 24, 2010

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  1. August 24, 2010 Linear Measurement

  2. Bellringer • Put your name on your homework and pass it to the front. • What is ¾ + 5/6 ?

  3. Unlike a line, a line segment, can be measured because it has two endpoints. • A segment with endpoints A and B can be name AB or BA. • The length or measure of AB is written AB.

  4. Introduction to measurement Inches

  5. Centimeters

  6. A standard ruler

  7. Challenge… • With your shoulder partner, find something in the room that is • A) 5 inches • B) 3.7 cm • C) Measure the length of Partner A’s pencil/pen in inches • D)Measure the length of Partner B’s pinky finger in centimeters

  8. Segment Addition Postulate • If M is between P and Q, then PM+MQ=PQ Q P M

  9. Two segments having the same measure are congruent ( )

  10. Rally Coach • Partners take turns, one solving a problem while the other coaches. • 1. Partner A solves the first problem. • 2. Partner B watches and listens, checks, coaches if necessary, and praises. • 3. Partner B solves the next problem. • 4. Partner A watches and listens, checks, coaches if necessary, and praises.

  11. Partner A- Draw DE that is 3 1/16 inches long. • Partner B- Draw FG that is 2 ¾ inches long.

  12. Partner A, Find LM, if MN=2.6 cm and LN=4 cm. L M N

  13. Partner B, Find LN, if LM= in and MN=2 ½ in. L M N

  14. Scribe and Sage

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

  16. Summary: • What measurement do the little lines on the inch side of a ruler show? • How many divisions are there in a centimeter on a ruler? • What does the angle addition postulate say?

  17. TIME

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