Activity 10
a. Define "congruent triangles."


b. Under what conditions can you know that two triangles are congruent? Why?


c. In the diagram below is triangle ABC congruent to triangle FED? Why or why not?


Activity 10 (continued)
In your group agree on definitions and properties from the previous page. You can write what you all agree on here, or on the blank sheets in the Workbook section.
Try to explain why the properties you noticed are the way they are.




We will discuss your definitions, properties and explanations as a class.
After the class discussion record the agreed upon definitions in your Notebook, under Definitions. Record properties everyone agrees about, but which no one can explain, under Postulates. Record properties which have been explained under Theorems.
Homework 8
p. 113 #1-15 (odd numbers)
What can you say about these 2 triangles?