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1. 5.7 Scale Drawings and Scale Models 
2. Definitions: Scale Drawing: is a two-dimensional drawing of an object that is proportional to the object.
 
3. More definitions: Scale : Gives the relationship between the drawings measurements and the actual measurement.
Ex:  “1 in. = 2 ft” means that 1 inch in the drawing represents an actual distance of 2 feet. 
5. Using Proportions to find unknown scales The length of an object on a scale drawing is 8 cm, and its actual length is 48m.  The scale is 1cm: ? m.  What is the scale?
 
6. Last definition: Scale Factor: The ratio of length in the drawing to the corresponding actual length. (Finding scale factors- Use same measurement units.)