Scale Drawings and Proportionality

This lesson introduces the concept of scale drawings and their relation to ratios and rates. It explains how scale drawings can be used in graphic design to create proportional enlargements or reductions. The lesson covers the importance of proportionality in scale drawings and provides examples and problems to illustrate these concepts.

What is the main focus of lesson 16?

• Learning about historical events

• Relating scale drawings to ratios and rates

• Understanding algebraic equations

• Studying biological processes

What does it mean to enlarge a scale drawing?

• To change the color of the drawing

• To rotate the drawing

• To make the drawing smaller

• To make the drawing bigger

Why is proportionality important in scale drawings?

• It changes the drawing's orientation

• It makes the drawing more complex

• It maintains the relative sizes of the drawing's parts

• It ensures the drawing is colorful

What is a scale factor in the context of scale drawings?

• A number used to add to the drawing

• A number used to divide the drawing

• A number used to multiply the sides of the drawing

• A number used to subtract from the drawing

In Celeste's example, what was the original height of her building drawing?

• 20 units

• 19 units

• 17 units

• 18 units

What was the constant of proportionality in Celeste's building drawing example?

• 2/3

• 3/4

• 1/2

• 1/3

In Luca's triangle example, what was the height of the enlarged triangle?

• 18 units

• 15 units

• 12 units

• 10 units

Why was Luca's triangle not considered a scale drawing?

• The shape was incorrect

• The sides were not proportional

• The drawing was incomplete

• The colors were different

What is the importance of checking every side in a scale drawing?

• To verify the drawing is proportional

• To make the drawing more complex

• To change the drawing's orientation

• To ensure the drawing is colorful

What should be done if the constant of proportionality is not the same for all sides?

• Change the drawing's orientation

• Consider it a scale drawing

• Ignore the differences

• Conclude it is not a scale drawing