Exploring Scale Factor and Scale Drawings in 8th Grade Math

What is the main focus of today's lesson?

• Exploring fractions

• Understanding scale drawings

• Learning about algebra

• Studying geometry

How is a scale factor different from a scale or key?

• Scale factor is used for maps only

• Scale factor involves multiplying dimensions

• Scale factor uses different units

• Scale factor is always less than one

What is the scale factor if the new distance is 5 and the original distance is 10?

• 2

• 0.5

• 10

• 5

In a map, if 1 inch represents 50 miles, what is this an example of?

• Scale factor

• Ratio

• Proportion

• Scale or key

How do you find the key if 5 inches on a map equals 250 miles in real life?

• Add 5 to 250

• Subtract 5 from 250

• Multiply 250 by 5

• Divide 250 by 5

If the scale of a drawing is 1 cm to 0.5 meters, what is the actual length if the drawing length is 4.5 cm?

• 4.5 meters

• 0.5 meters

• 1.5 meters

• 2.25 meters

Given a scale of 1 cm to 0.5 meters, what is the drawing length if the actual distance is 11.2 meters?

• 22.4 cm

• 5.6 cm

• 11.2 cm

• 2.8 cm

What is the scale factor if 1 cm represents 0.5 meters?

• 1:10

• 1:100

• 1:50

• 1:0.5

How do you convert 0.5 meters to centimeters?

• Subtract 100

• Multiply by 100

• Add 100

• Divide by 100

If the drawing length is 22.4 cm and the actual length is 11.2 meters, what is the scale?

• 1 cm to 0.25 meters

• 1 cm to 2 meters

• 1 cm to 1 meter

• 1 cm to 0.5 meters