E1.3 Use scale drawings to calculate actual lengths and areas, and reproduce scale drawings at different ratios.
Activity : Use and Reproduce a Scale Drawing
Example 1
Here is a scale drawing of a pool.
![](/img/activite/sens-de-l-espace/en/8e/VE8_SDE_Image53_en.png)
Source: translated from En avant, les maths!, 8e année, ML, Sens de l’espace, p. 13.
- Using the 1:100 scale, determine the area occupied by the pool in meters.
- Make a scale drawing of the pool, using a scale of 1:50.
Example 2
Here is a drawing that represents identical windows in a scale of 1:20.
Determine the actual area of the two windows.
![A plan of two windows, the width is “2” point “25” centimeters and the length is “7” point “5” centimeters.](/img/activite/sens-de-l-espace/en/8e/VE8_SDE_Image54_en.png)
Source: translated from En avant, les maths!, 8e année, ML, Sens de l’espace, p. 15.