RATIOS OF SCALE DRAWINGS. SCALE DRAWINGS SCALE DRAWINGS: A scale drawing is a drawing that represents a real object. The scale of the drawing is the ratio.

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Presentation transcript:

RATIOS OF SCALE DRAWINGS

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