SCALE

Ø is a comparison of two objects; the actual size and its diagram

Ø Scale can be expressed as a ratio (most common), as a fraction, as a percent, in words or as a diagram.

A scale of 1:50 means that 1 unit on the diagram is equal to 50 units of the actual object.

SCALE DIAGRAM

Ø Is similar or the actual or object. It maintain proportion, the diagram may be longer or smaller than the actual object.

There are two ways to find a missing length of proportion:

Example One: Use scale to determine the Actual Length of an Object.

For a scale of 1:14 and a diagram measuring 5.5cm set the proportion.

       SCALE

Ø is a comparison of two objects; the actual size and its diagram

Ø Scale can be expressed as a ratio (most common), as a fraction, as a percent, in words or as a diagram.

A scale of 1:50 means that 1 unit on the diagram is equal to 50 units of the actual object.

SCALE DIAGRAM

Ø Is similar or the actual or object. It maintain proportion, the diagram may be longer or smaller than the actual object.

There are two ways to find a missing length of proportion:

Example One: Use scale to determine the Actual Length of an Object.

For a scale of 1:14 and a diagram measuring 5.5cm set the proportion.

                  x= 5.5(14)

                   x=77cm

Because it is easy to find the relationship of 1 to 5.5 it easy to find x, simply multiply 14 by 5.5 to find x=77cm- So the actual object is 77cm.           x= 5.5(14)

                   x=77cm

Because it is easy to find the relationship of 1 to 5.5 it easy to find x, simply multiply 14 by 5.5 to find x=77cm- So the actual object is 77cm.

Example Two: Use Measurement to find Scale

An object measures has an actual measurement of 120 km. What is the scale?

      Set up a proportion: 1 km= 100000cm

 

So the scale is 1:2400000cm or 1:24km


HOMEWORK: ALL OF THE WORKSHEET & TEXTBOOK 
                        WORKBOOK 
                        MANGAHIGH CHALLENGE