Scale drawing - Part 2

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Activity investigates actual how a blue print represents actual dimensions.


Measuring actual dimensions from a blueprint

Estimated Time

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.