Quizizz Lesson: Scale Drawings and Maps

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.

We find this by comparing one measurement to another.

We can calculate the scale comparing the drawing:object

3:6 then reducing 3/3=1, 6/3=2 so the scale is 1:2

It can also be written as 1 to 2 or 1/2

The scale is: 1:2

the size of the drawing : size of the object

Scale 1 : 2

Labelling

Is each example an of enlargement, reduction or did it stay the same?

Drag labels to their correct position on the image

Same

enlargement

reduction

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 Select

Check all the sides that correspond? (There are multiple answers)

• 4 and 8

• 6 and 12

• 5 and 10

• 1 and 8

Multiple Select

What is the scale of the reduction to the object?

• 1:2

• 3:1

• 3:5

• 8:3

Multiple Choice

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet
• 16 feet 
• 10 feet
• 4 feet

Multiple Choice

From Denver to Chicago = 3 in. If the scale is 1 in = 300 miles, find the actual distance.

• 300 miles
• 1000 miles
• 900 miles
• 600 miles

Open Ended

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

Multiple Choice

What is the scale factor from triangle DEF to triangle ABC?

• 1/2
• 7/3
• 2/1
• 10/3

Multiple Choice

On the map from Clarksville to Little Rock is 4 cm. Find the actual distance

• 20 miles

• 60 miles

• 80 miles

• 120 miles

Multiple Choice

On the map from Hollywood to Sumter is 3 cm. Find the actual distance

• 81 miles

• 50 miles

• 34 miles

• 12 miles