Introduction
One of the many ways in which an understanding of Ratios and Proportions is relevant to the 'real-world' is through scale factor. The Scale of something is the ratio of the length in a drawing (or model) to the length of the real thing.
OKPASS 7.2.1.c Demonstrate the concept of ratio and proportion with models (e.g., similar geometric shapes, scale models).
CC.7.G.1 Solve problems involving scale drawings of geometric figures, including computing actual lengths and areas from a scale drawing and reproducing a scale drawing at a different scale.
Task
This webquest will assist you in exploring the relationship between your previous knowledge of ratios and proportions and scale models and drawings.
Process
- First go to http://mathsnacks.com/atlantean-dodgeball-en.html and watch the animation for Atlantean Dodgeball.
- Then complete the attached worksheet in its entirety.
- Now go to https://www.youtube.com/watch?v=GEqJtnEYDZs and watch this short refresher video on solving proportions.
- Next, go to http://www.mathplayground.com/ASB_DirtBikeProportions.html and play one round of Dirt Bike Proportions to practice your skills.
- This time got to https://www.schooltube.com/video/db947e60c655487bb0d5/Similar%20Figures%20by%20Shmoop and watch the video about similar figures.
- Then go to http://www.asset.asu.edu/new/mathactive/lessons/265/lesson.swf and complete the practice problem on the back of this page.
- Now go to https://www.mangahigh.com/en-us/math_games/shape/similar_shapes/solve_problems_with_similar_shapes and practice what you’ve learned.
- Next visit http://mathsnacks.com/scale-ella-en.html and watch the video of Scale Ella.
- Then go to http://www.shmoop.com/math-shack/geometry/scale-factor/ and practice this skill. Use the hints provided to complete the task.
- Finally, go to http://www.mathplayground.com/ScaleFactorX/GameLoader.html and play this game until the end of class.
Conclusion
Turn in this page with your name on it and the attached Atlantean Dodgeball worksheet for credit.