## Tuesday, December 13, 2011

### 4.2 Scale

SCALE: is a comparison of two objects; the actual size and its diagram.

Scale can be expressed as a ratio, 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: is similar o

r t

he actual or object. It main

There

are two ways to find a missing length of proportiontain proportion, the diagram may be longer or smaller than the actual object.

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

For a scale of 1:14 and a

diagram measuring 5.5c

m set the proportion.

SCALE: is a comparison

of two objects; the actual size and its diagram.

Scale can be expressed as a ratio, 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 :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

For a scale of 1:14 and a diagram measuring 5.5cm set the proportion.Example One: Use scale to determine the Actual Length of an Object.

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 act
ual object is 77cm.

x= 5.5(14) x=77cm

Becau

se 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.

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

Dont forget to do all the textbook work, worksheets and workbook work!!
And all mangahigh challenges are for marks! Keep playing! (: