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Grade 9: Math: Similar Figures






Instructional Design: Caroline Erickson


Stage 1 - Desired Results




Established Goals:
Specific Outcomes:
Recognise when, and explain why, two figures are similar.  Use this activity to further explain when two triangles are similar.

ICT Outcomes:
Below is a pdf file identifying all of the ICT outcomes touched on throughout this project. Click on the file to download it to your computer.

General Outcomes:
Specify  the conditions under which figures, including triangles, may be similar or congruent.

Essential Questions:
What is similarity?
What is congruency?
Why are ratios important to finding similarity?  

Students will know:
Definitions of congruency and similarity.
Proper labelling of figures to illustrate the original and the new figure.  

Students will be able to:
Use the ratios of sides to assess whether a figure is similar or not.






Stage 2 - Assessment Evidence






Performance Task(s)
Your job is to enter appropriate data in the spreadsheet and use it to compare several figures to figure out which ones are similar.

Other Evidence (Quizzes, test, etc)
Accuracy of responses

Self Assessment




Stage 3 - Learning Plan






Teaching and Learning Activities
1. Prior to the lab session, students will have completed  a lesson on congruent figures.

2.  Students will have an understanding of the difference between a congruent and a similar figure.  

3.  Show students the importance of matching the appropriate sides in order to compare the ratios of similar figures.

4.  Show students how to input data in a spreadsheet.

5.  Use spreadsheets to interpret which figures are similar and which are not.


Additional Teacher Resources
These are documents for teachers and/or students that were developed to support the project.  Documents will always be available in pdf format as well as in the original format created (e.g. MS Word, AppleWorks, Inspiration, etc)



Rubric(s)






Click to download Rubric

There is no rubric for this project.




Student Exemplars







There is no exemplar for this project.
        
        



 Last Modified: 16 August,2005