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Understanding Scale Drawings: Practical Applications and Proportional Division

This learning session focuses on understanding scale drawings and their application in real-life scenarios. We define the scale, such as 1 cm = 2 m, indicating that every 1 cm on the drawing represents 2 m in reality. We’ll explore how to interpret scales in maps and diagrams, using practical examples including the scale of 1 cm = 1 m or 1 cm = 90 cm. Students will learn to calculate actual dimensions using given scales and will engage in exercises to reinforce their understanding of proportional division in scale drawings.

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Understanding Scale Drawings: Practical Applications and Proportional Division

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  1. Starter Questions

  2. Mixing paint – Proportional Division

  3. Scale Drawings & Bearings Learning Intention • To understand the term scale drawings and how they are used in real life.

  4. Scales Definition A scale of 1 cm = 2m This simply means for every 1cm measured on a drawing this represents 2m in real-life.

  5. Scales In order to make sense of a map or scale diagram the scale must be known. For this scale model 1 cm represents 1m 4 cm This means for every 1 metre of the actual car, 1cm is drawn on the map.

  6. Scales The scale of this drawing is 1cm = 5m 6cm What is the actual length of the tree ? 30m 6 x 5 =

  7. Scales Scales The scale of this drawing is 1cm = 90cm The scale of this drawing is 1cm = 90cm What is the actual length of the bus in metres ? 5cm 450cm 5 x 90 = 450cm 5 x 90 = 4.5m 4.5m

  8. Scales Now try Ex 1 Ch17 (page 194)

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