7th Grade Math

Lesson 2B Scale Drawings and Models 287

GEOGRAPHY Find the actual

distance between each pair

of cities in New Mexico.

Use a ruler to measure.

Example 1

11 Carlsbad and Artesia

2. Hobbs and Eunice


3. Artesia and Eunice


4. Lovington and Carlsbad

Example 2 5. BRIDGES An engineer makes a model of a bridge using a scale of

1 inch = 3 yards.

50 yards

4 yards

a. What is the length of the model?

b. What is the height of the model?

Example 3 Find the scale factor of each scale drawing or model.

6.

1 inch = 4 feet

7.

1 centimeter = 15 millimeters

8. CITY PLANNING In the aerial view of a Main Street
   city block at the right, the length of
   Main Street is 2 inches. If Main Street’s
   actual length is 2 miles, find the scale
   factor of the drawing.

Example 4 9. DECORATING Julianne is constructing

a scale model of her family room to

decide how to redecorate it. The

room is 14 feet long by 18 feet wide.

If she wants the model to be 8 inches

long, about how wide will it be?

25 km

0 1 cm

Carlsbad

Artesia

Lovington

Hobbs

Eunice

NEW MEXICO





 







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