Note on Scale Drawing

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Scale Drawing

A drawing that shows a real object with accurate sizes reduced or enlarged by a certain amount is called the scale drawing.

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For example: This drawing has a scale of "1:10", so anything drawn with the size of "1" would have a size of "10" in the real world, so a measurement of 1mm on the drawing would be 10mm on the real horse.
 
Example 1

Write the scale 1 cm to 1 m in ratio form.

Solution

1cm to 1m

= 1cm : 1m

= 1cm : 100cm

= 1 : 100

Example 2

Simplify the scale 5 mm: 1 m

Solution:

5mm : 1m

= 5mm : 100cm

= 5mm : 1000mm

= 5 : 1000

= 1 : 200

  • A bearing is an angle, measured clockwise from the north direction.
  • A scale drawing of a human cell is larger than the actual size.
  • A scale drawing can be expressed by using a unit in 1 cm to 1 km.
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Very Short Questions

Solution:

1 cm to q m

= 1 cm : 1 m

= 1 cm : 100 cm

= 1 : 100

Solution:

5 mm : 1 m

= 5 mm : 100 cm

= 5 mm : 1000 mm

= 5 : 1000

= 1: 200

Solution:

5 cm : 2 km

= 5 cm : 2 km

= 5 cm : 200000 cm

= 1 : 4000

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