Scale Drawings

Scale Drawings

Introduction

• What do you notice about the drawing of the horse compared to the actual horse?

• What questions do you have about the two versions?

Multiple Choice

What change was made to the actual horse?

• Exact Copy

• Reduction

• Enlargement

Scale drawing

In order for an original drawing to be reduced or enlarged, every corresponding side must be PROPORTIONAL to the original measurements.

We use MULTIPLICATION to make things bigger or smaller.

Multiple Select

Which pairs of corresponding sides are proportional?

• The bottom of each shape because 4 times 3 is 12

• The right side of each shape because 4 times 3 is 12

• The left side of each shape because 4 times 3 is 12

• The slanted line on the left because 2.2 times 3 is 6.6.

• The slanted line on the right because 2.2 times 3 is 6.6

Multiple Choice

How is Figure F reduced to Figure B?

• Multiply each side by 1/2

• Multiply each side by 1/3

• Multiply each side by 1/4

• Multiply each side by 1/5

Fill in the Blanks

The scale factor is

to enlarge triangle ABC to triangle DEF?

Multiple Choice

Which copies are scale drawings when compared to the original triangle?

• 1, 2, and 3

• 1 and 2

• 2 and 3

• 1

• 2

Open Ended

Explain why Copy 3 is NOT a scale drawing of the original triangle.

Open Ended

Is Figure B an enlargement of Figure A? Explain why or why not.