Understanding Scale Factors and Ratios

Mrs. Stevens reviews scale factors, focusing on enlargements. She solves problems involving a basketball court, a garden, and an advertisement, demonstrating how to calculate actual dimensions from scale drawings. The lesson concludes with a final example, reinforcing the concept of scale ratios.

What is a scale factor less than one used for?

• Enlargement

• Translation

• Reduction

• Rotation

In the context of scale drawings, what does a scale factor greater than one indicate?

• The object is rotating

• The object is getting smaller

• The object is getting larger

• The object is unchanged

What is the scale ratio if 1 inch on a drawing corresponds to 15 feet in reality?

• 1:15

• 15:1

• 1:1

• 15:15

How do you convert a mixed fraction to an improper fraction?

• Multiply the whole number by the denominator and add the numerator

• Add the whole number to the numerator

• Multiply the numerator by the denominator

• Subtract the numerator from the whole number

If a garden scale is 1 cm for every 20 meters, what is the actual length if the drawing shows 8 cm?

• 160 meters

• 80 meters

• 40 meters

• 20 meters

What is the scale ratio if a picture is enlarged from 0.25 inches to 1 inch?

• 1:4

• 4:1

• 1:1

• 0.25:1

In the final example, what is the scale factor if the actual distance is 4.5 feet per 8 inches?

• 36 feet per inch

• 8 feet per inch

• 9 feet per inch

• 4.5 feet per inch