Pre-AlgebraScale Drawings
Scale Drawings
Learn how to create and interpret scale drawings, and understand their real-world applications.
Understanding Scale Drawings
What is a Scale Drawing?
- A proportional representation of an actual object or place
 - Uses a scale factor to show larger or smaller versions
 - Maintains the same shape and proportions as the original
 - Common in maps, blueprints, and technical drawings
 
Scale Ratios
- Written as a ratio (1:50) or fraction (1/50)
 - First number represents the drawing measurement
 - Second number represents the actual measurement
 - Example: 1 inch on paper = 50 inches in reality
 
Making Scale Drawings
- Choose an appropriate scale
 - Convert actual measurements using the scale
 - Draw accurately using converted measurements
 - Include a scale key or legend
 
Real-World Applications
- Architecture and construction plans
 - Maps and geography
 - Engineering drawings
 - Model making and design
 
Practice Problems
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Quick Tips
- Always include units when working with scale drawings.
 - Check that your calculations make sense in the real world.
 - Keep track of which measurements are from the drawing and which are actual.