Scale Drawing

Page 1

A fraction can be written as a decimal or a ratio.

ex) 3/4 = 0.75 = 3:4

Ratio - a comparison of numbers, such as 4:5 or 4/5.

Rate - a comparison of two measurements with different units, such as 90 km/h.

ex) 90 km/h compares distance to time.

Scale - a ratio that compares a measurement in real life to a measurement on a drawing in a model.

ex) 1:1000

1 - drawing measurement

1000 - real life measurements

Eiffel tower

1:10 000

3 cm drawing measurement

1:10 000 = 3:30 000 cm : 300 m.