1. Aim: How are triangles congruent?
Do Now: Solve each proportion.
4 = = 4.2
x h

2. Vocabulary
Congruent polygons – polygons that have the same shape and size
Angles measure the same (look for angle notation)
The length of the sides are the same (look for tick marks)
SYMBOL  
Order matters!!
Corresponding Parts – parts of the congruent triangles that “match”

3. Example
Determine the corresponding parts.

4. Practice
1. Based on the given polygons, fill in the blanks.
____

5. Practice
2. Based on the given polygons, fill in the blanks.