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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 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. • The length or measure of AB is written AB.
Introduction to measurement Inches
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
Segment Addition Postulate • If M is between P and Q, then PM+MQ=PQ Q P M
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.
Partner A- Draw DE that is 3 1/16 inches long. • Partner B- Draw FG that is 2 ¾ inches long.
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
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?