6th Grade Math Textbook, Fundamentals

Lesson 6-6 for exercise sets. &KDSWHU 

3UDFWLFH   $FWLYLWLHV

1.A scale drawing of a pentagonal building measures 6 cm on each side.

The scale used is 1 cm 5.5 m. How long is each side of the building?

2.Discuss and Write Draw a net on grid paper for a scale model of a cube that is 3 cm

on each edge. Use a scale factor of. Explain how you can enlarge the model.^21

A is a three-dimensional model that accurately

represents a real object. A scale written as a ratio in simplest

form is called the. It tells how much larger or

smaller the scale model is than the actual object it represents.

You can make a net, or a two-dimensional pattern to make a

scale model of a three-dimensional figure.

• This net can be folded to form a cube.

scale factor

scale model Key Concept

Scale Factor

scale factor 

The terms of a scale factor are

always like units.

scale model

actual object

• The net below shows an enlargement of the
  net above using the scale factor. You can
  fold it to form a larger scale model of the
  original cube.
  
  
  1. 5
     1
     
     
     • The net below shows a reduction of the net
       above using the scale factor. You can
       fold it to form a smaller scale model of the
       original cube.
     
     
     
     
  
  
  
  

1

2

Varying the Scale

This spreadsheet shows that for an
actual distance of 30 ft and a scale

factor of , the scale drawing

will be 3.6 inches in length. When
you enter new scale factors and
dimensions, the spreadsheet
automatically calculates new values.

1

100