RATIOS OF SCALE

DRAWINGS

SCALE DRAWINGS:

•A scale drawing is a drawing that represents a real object. The scale of the drawing is the ratio of the size of the drawing to the actual size of the object. • Examples: blueprints and maps.

SCALE FACTOR:

• The scale factor is the ratio of the new image size to the corresponding old image size. • Example: If a model car has a scale factor of

1/10 , then a part that is 1 cm on the model would be 10 cm on the real car.

TWO TYPES OF SCALE DRAWINGS:Enlargement- a drawing with a scale factor greater than 1. The image is larger than the original figure.

 Reduction- a drawing with a scale factor less than 1. The image is smaller than the original figure.