Course 2, Lesson 7-5 Find the length of each object on a scale drawing with the given scale. Then find the scale factor. 1. a subway car 34 feet long;

Course 2, Lesson 7-5

Find the length of each object on a scale drawing with the given scale. Then find the scale factor.

1. a subway car 34 feet long; 1 inch = 5 feet

2. a table 1.5 meters long; 3 centimeters = 0.25 meters

3. The distance between New York City and Washington, D.C., is

3.75 inches on a map of the United States. The scale on the map

is 1 inch to 90 miles. How far is Washington, D.C., from New York

City?

4. The actual distance from Atlanta to New Hope is 425 miles. A

map shows a distance of inches. Write a ratio to accurately

show the relationship between the actual distance and the scale

distance?

26

3


ANSWERS

1. in.;

2. 18 cm;

3. 337.5 mi

4.

46

5

160

325

363 :1

4

Geometry


HOW does geometry help us describe real-world objects?

Course 2, Lesson 7-5 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

Geometry

• Preparation for 7.G.3Describe the two-dimensional figures that result from slicing three-dimensional figures, as in plane sections of right rectangular prisms and right rectangular pyramids.

Mathematical Practices

1 Make sense of problems and persevere in solving them.

3 Construct viable arguments and critique the reasoning of others.

4 Model with mathematics.

• To draw the top, side, and front views of a three-dimensional figure

• To draw the corner view of a three-dimensional figure given the figure’s top, side, and front views


Geometry

How did what you learned today help you answer the


Geometry


How did what you learned today help you answer the


Geometry


Sample answers:• To draw top, side, front, and corner views of a three-

dimensional real-world object• To draw a corner view of a three-dimensional real-world

object given the object’s top, side, and front views

Explain how knowinghow to draw

three-dimensionalfigures helps in finding

the volume ofthree-dimensional figures.


Ratios and Proportional Relationships

FunctionsGeometry

Documents

Course 2, Lesson 7-5 Find the length of each object on a scale drawing with the given scale. Then find the scale factor. 1. a subway car 34 feet long;