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Scale Drawings Matchbook Definitions: MG 1.2 Construct and read scale drawings MG 1.3 Use measures expressed as rates. Purpose and Rationale: Students will use proportional analysis to determine and comprehend how to read and create scale drawings. Concept Map: Prior Skills: Set up and solve a proportion Solve one-step equations Measuring with a ruler Dimensional analysis Reading Scale Drawings Understand the scale Set up scale as ratio Measure length of side Set up proportion Solve for unknown Creating Scale Drawings Use given dimensions to draw additional rooms. Add other pictures to the drawing using the scale

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Use an overhead projector to demonstrate scale drawings and proportional size of objects.

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Introduce the reading of scale drawings by having students determine the actual size of a room that was drawn to scale. Students will then create their own room additions using the same Scale from the original room.

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Bedroom Scale 1 inch = 4 feet Ratio = ------

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Rooms Actual Size Scale Size Kitchen 12 ft by 16 ft _________ Living Room 16 ft by 20 ft _________ Second Bedroom 12 ft by 12 ft _________ Bathroom 8 ft by 8 ft _________ Measurements for Scale Drawing Additional Drawings ___________________________________ Dimensions of the bedroom: Width = ________ Length = _______ Name:_________________ Date:________

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Proportions and Scale Drawings Textbook Pages 417-422.

Proportions and Scale Drawings Textbook Pages 417-422.

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