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# Day 4 indirect measurement

## by Erik Tjersland on May 30, 2012

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## Day 4 indirect measurementDocument Transcript

• AIM: Indirect Measurement Do Now 1
• Anticipatory SetHow can we find the heightof the flagpole in front ofthe school without taking itdown? Determine a methodfor finding the answer. 2
• Before You Leave Flagpole Action Plan1.) What steps need to be taken to find the height of theflagpole indirectly?2.) What materials do you need?3.) What information they need to find first based ontoday‛s lesson? 3
• Anticipatory SetYesterday we began discussing the use of indirect measurement(measuring without using a ruler). 4
• D.) Using Indirect MeasurementCity officials want to know the height of a traffic light. Thetraffic light casts a shadow that is 45 ft long. A stop sign castsa shadow that is 30 ft long. If the stop sign is 15 ft high, what isthe height of the traffic light? 5
• 1   A.) Write and solve a proportion to find the height of the shorter person. 6
• 2   B.) Write and solve a proportion for this problem. 7
• 3   C.) Write and solve a proportion to find the height of the flagpole. 8
• 4   D.) Write and solve a proportion for this problem. 40 m 9
• 5   E.) Write and solve a proportion to find the length of the shadow of the streetlight. 10
• Before You LeaveIn the near future we will be going outside to use indirectmeasurement, what materials do we need to bring with us tocomplete the activity? 11
• Mr. Tjerslands Math 7Homework: Pages 286-287#5-9 all, 20-22 all 12