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5.4 SCALE DRAWING STUDENTS WILL USE A SCALE DRAWING TO FIND A MISSING MEASURE
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PROBLEM 12 Is the distance across the river greater than 100 meters? Explain.
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VOCABULARY Scale- the ratio that compares the drawing or model with the actual object Scale Drawing- a proportional two-dimensional drawing of an object Scale Model- a proportional three dimensional model of an object
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EXAMPLE 1 What is the actual distance d between Cadillac and Detroit. The map distance is 3.5 cm.
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EXAMPLE 2 The Liquid outer core of the earth is 2300km thick. A scale model of the layers of the Earth has a scale of 1in: 500 km. How thick is the liquid outer core in this model?
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EXAMPLE 3 A scale drawing of a spider is 5 cm long. The actual spider is 10 mm long. (a) what is the scale of the drawing? (b) what is the scale factor of the drawing? A) B)
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5.4B SCALE DRAWINGS STUDENTS WILL USE SCALE DRAWINGS TO FIND MEASUREMENT
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EXAMPLE 4 Central Park is a rectangular Park in New York City. Find the Actual Area of the park.
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CHECK FOR UNDERSTANDING
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