Understanding Scale Drawings and Conversions

This lesson, led by Mrs. Zapia, focuses on computing actual lengths from scale drawings. Students learn to identify scale factors, calculate actual dimensions, and apply these skills to real-world scenarios, such as fitting a basketball court on a school lot, determining garden size, enlarging a tablet image for an advertisement, and checking if set panels fit through a mall entrance.

What is the main focus of lesson 18?

• Exploring ancient civilizations

• Learning about historical figures

• Understanding scale drawings

• Studying geometric shapes

What is Vincent's proposal to the student government?

• To organize a school trip

• To start a new club

• To install a basketball court

• To build a new library

What is the scale used for Vincent's basketball court drawing?

• 1 inch represents 25 feet

• 1 inch represents 20 feet

• 1 inch represents 15 feet

• 1 inch represents 10 feet

How do you calculate the actual length from a scale drawing?

• Divide by the scale factor

• Add the scale factor

• Multiply by the scale factor

• Subtract the scale factor

What is the actual length of the basketball court if the scale drawing length is 2 inches?

• 20 feet

• 30 feet

• 25 feet

• 35 feet

What is the scale used for the garden drawing?

• 1 cm represents 25 meters

• 1 cm represents 15 meters

• 1 cm represents 10 meters

• 1 cm represents 20 meters

How do you convert the scale to a scale factor?

• Convert larger units to smaller units

• Convert smaller units to larger units

• Add the units together

• Subtract the units

What is the purpose of using a scale factor?

• To increase the number of units

• To reduce the number of units

• To compare sizes accurately

• To simplify calculations

What is the scale ratio used by the graphic designer for the advertisement?

• 1:10

• 1:25

• 1:15

• 1:20

What is the actual width of the tablet in the advertisement if the scale width is 1 1/8 inches?

• 5 inches

• 5.5 inches

• 4.5 inches

• 4 inches