# Scale drawing - Part 2

Activity investigates actual how a blue print represents actual dimensions.

### Objectives

Measuring actual dimensions from a blueprint

45 minutes

### Prerequisites/Instructions, prior preparations, if any

• The students should have knowledge about scale drawing.
• They should know about scale factor.
• They should understand that a scaling factor should be maintained as constant throughout the sketches.
• Students should be able to read and understand a scaling factor.
• They should be able to find a scaling factor and create a scale drawing.
• The activity on using standard measuring instruments should be done prior to this activity.
• The students should have been introduced to area, calculations and unit conversions.

### Materials/ Resources needed

Non digital: Graph sheets, scale, pencil

### Process (How to do the activity)

1. In the above blue print each individual unit is 4 feet.
2. Explain the meaning of 1 unit.
3. Each ceramic tile costs Rs 80 per square foot.
4. How much would it cost to tile the bathroom ?
5. How much would it cost to tile Kitchen, Living room and bedroom?
• Developmental Questions
1. Along with knowing the length and width of the scale model, what additional information do you need to know ?
2. What is the scale factor here.
• Evaluation
1. What is 1 unit in the given blue print.
2. What does '1 unit = 4 feet mean' ?
3. What are the actual dimensions of each room ?
4. What all factors do you need to know to estimate the painting costs for each of the rooms.
5. Write down the sequential steps for the calculations.