Scale Drawings and Similar Figures

What is a scale drawing?

• a board of scales
• Bigger or smaller proportion of an actual object.
• a drawing of all types of scale 
• to show how to draw

A globe is a

• Scale drawing

• Scale model

A map is a

• scale drawing

• scale model

Match the following:

• in the same location

• Similar figures are

• the same shape but different sizes

• Similar figures have side lengths that are

• create a proportion and cross multiply

• Corresponding

• proportional

• Similar figures have angles that are

• congruent (equal)

• To find the missing side length in similar figures

The distance from Point A to Point B on a scale drawing is 6 cm. If the scale is 1cm : 10m. What is the actual distance from A to B?

• 6 m
• 10 m
• 18 m
• 60 m

Maura is building a 24 in tall model of the Gateway Arch in St. Louis, Missouri.  The scale is 3 in : 78.75 ft.  Estimate the height of the actual arch.

• 630
• 600
• 400
• 200

Find missing side

• 5
• 7
• 9
• 11

Find side length X.

• 30
• 25
• 15
• 40

The ratio of girls to boys in the class is 3 to 4. There are 12 girls. How many boys are there?

• 16

• 28

• 4

• 9

On a map, the distance between two cities is 7 centimeters. The map uses a scale in which 1 centimeter represents 25 kilometers. What is the actual distance between these two cities in kilometers?

• 175

• 185

• 200

• 220