Scale Factor

1
Scale Factor

• Unit 7

2
Dimensions

• The measure of the magnitude or size of an object.

3
Proportion

• An equation which states that two ratios are
  equal.

You can use the cross product to determine if two
ratios form a proportion.
4
Proportion

• An equation which states that two ratios are
  equal.

1 100
25 4

100
100

You can use the cross product to determine if two
ratios form a proportion.
5
Ratio

• A comparison of two quantities.

colon
fraction
the word to
Ratios can be written in three different ways.
6
Scale Drawings

• Drawings that represent relative sizes and
  placements of real objects or places.

All lengths in the drawing are proportional to
the actual lengths in the real object or place.
7
Scale Drawings
8
Scale Drawings
All lengths in the drawing are proportional to
the actual lengths in the real object or place.
9
Scale Factor

• The ratio of corresponding lengths of the sides
  of two similar figures.

The ratio of the size of the drawing to the size
of the actual object.
10
Similar Figures

• Figures that have the same shape but not
  necessarily the same size.

11
Similar Figures

• Figures that have the same shape but not
  necessarily the same size.

• In similar figures, corresponding angles are
  congruent and corresponding segments are in
  proportion.

12
Unit

• A fixed amount that is used as a standard of
  measurement.

Customary Unit
Metric Unit

• in inches
• ft feet
• mi mile
• yd - yard

• cm centimeter
• mm millimeter
• m meter