5.4 SCALE DRAWING STUDENTS WILL USE A SCALE DRAWING TO FIND A MISSING MEASURE.

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5.4 SCALE DRAWING STUDENTS WILL USE A SCALE DRAWING TO FIND A MISSING MEASURE

PROBLEM 12 Is the distance across the river greater than 100 meters? Explain.

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

EXAMPLE 1 What is the actual distance d between Cadillac and Detroit. The map distance is 3.5 cm.

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?

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)

5.4B SCALE DRAWINGS STUDENTS WILL USE SCALE DRAWINGS TO FIND MEASUREMENT

EXAMPLE 4 Central Park is a rectangular Park in New York City. Find the Actual Area of the park.

CHECK FOR UNDERSTANDING