1 / 11

5.4: Scale Drawings

5.4: Scale Drawings. Scale Factor. The relationship between measurements on the drawings can be described by using a scale factor . When you make a drawing twice as wide and twice as tall, your scale drawing has a scale factor of 2:1. 1/2 inch on the original =. 1 inch on the scale drawing.

dee
Download Presentation

5.4: Scale Drawings

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 5.4: Scale Drawings

  2. Scale Factor • The relationship between measurements on the drawings can be described by using a scale factor. • When you make a drawing twice as wide and twice as tall, your scale drawing has a scale factor of 2:1. 1/2 inch on the original = 1 inch on the scale drawing.

  3. Scale Factor • So, the scale factor is always written as measurement on model : measurement on actual or original Or Original: Each square = ½ inch Drawing: Each square = 1 inch Scale Factor: 2:1 or 2/1

  4. Simplifying the Scale Factor Original: Drawing: Each square= 1/2 inch Each square = 1/4 inch What is the scale factor on the smaller scale drawing of Calvin?

  5. Scale Factor Scale factors are usually expressed using 1 unit. • Real Eiffel Tower: • 324 meters tall • LEGO Eiffel Tower: 1.08 meters tall. • Instead of writing • 1.08 : 324, • we write • 1 : 300 • or 1/300

  6. Common Scale Factors • House Plans/Floor Plans: ¼” scale, which means 1/4 inch stands for 1 foot: 1:48. • N scale model trains: 1:148. • Hot Wheels: 1:64 • Radio-controlled car: 1:10 • Traditional Dollhouses: 1:12, 1:18, or 1:24 • Barbie Dollhouse: 1:6

  7. Using scale factors: Practice

  8. Scale Models and Drawings are Proportional • The reason a scale model or scale drawing looks similar to the actual or original thing is that all measurements on the model/drawing are proportional to measurements on the actual/original. • This means that every part of the drawing is the same number of times bigger or smaller than the original or real thing. • Stewie’s foot on the original drawing is ½ inch long. • How long is Stewie’s foot on a 2:1 drawing? • On a 0.5:1 drawing? • If you made a 10:1 scale drawing of the original Stewie, how long would his foot be?

  9. Scale • Another way to relate models to actual things is to use a scale, which includes units in different measurements.

  10. Use a Proportion to Solve Scale Drawing/Model problems.

  11. Practice

More Related