Page 10 - Math Booklet Prep1first part1_Neat
P. 10

PPrriimmarryy56

                                                                                                                  Date :

Applications of Ratio and Proportion

First: (Drawing scale)

? Drawing scale: is the ratio between drawing length and real length

? drawing scale =  drawing length
                   real length or ( D.S = drawing length : real length)

? Drawing length = drawing scale × real length.

? Real length      = drawing length
                     drawing scale

? Both lengths should have the same units.

? Drawing length photo length or picture length or map length

? Drawing length may be in cm.

? Real length may be in km      (distance between two cities) .

                   meter (building) .

                   cm (small object) .

                   mm (insects) .

                                10
   5   6   7   8   9   10   11   12   13   14   15