Exploring Scale Factors in Scale Drawings

The video tutorial explains the concept of scale factors, focusing on their representation as percentages, fractions, and ratios. It covers how scale factors are used to enlarge or reduce drawings and models, providing examples and calculations. The tutorial also includes a practical application involving a dog pen, demonstrating how to apply scale factors to determine new dimensions. The session concludes with a recap and a to-do list for students.

What can a scale factor be expressed as?

• Only a percentage

• Only a ratio

• Only a decimal

• A fraction, a ratio, or a percent

If a scale factor is 150%, what does it indicate about the size of the object?

• The object size is reduced

• The object size remains the same

• The object size is halved

• The object size is increased

What does a scale factor less than 100% indicate?

• A doubling in size

• No change in size

• A decrease in size

• An increase in size

If a drawing's scale factor is 65%, what is the effect on the drawing's size?

• It reduces to 65% of its original size

• It doubles in size

• It remains unchanged

• It becomes 65% larger

What is the correct way to calculate the scale factor between two figures?

• Old dimension over new dimension

• Difference between old and new dimensions

• New dimension over old dimension

• Sum of old and new dimensions

What is the new size of a side that was originally 2 units after applying a scale factor of 150%?

• 3 units

• 4 units

• 2 units

• 1 unit

How do you convert a percentage to a decimal for calculation purposes?

• Divide by 100

• Add 100

• Subtract 100

• Multiply by 100

In a scale drawing, if the original width is 5 units and the scale factor for width is 125%, what is the new width?

• 6 units

• 7.5 units

• 5 units

• 6.25 units

What does a scale factor of 1.5 mean in terms of enlargement?

• Original size remains the same

• 50% enlargement

• 150% of the original size

• 50% reduction

If the original dimension is 12 units and the scale factor is 60%, what is the new dimension?

• 6 units

• 18 units

• 12 units

• 7.2 units