1. Congruence and Similarity pg. 87
Unit 1 Chapter 2
Congruence and Similarity
pg. 87

2. Congruence and Transformations pg. 95
Lesson 1
Congruence and Transformations
pg. 95

3. Vocabulary Composition of Transformations Corresponding Parts
The resulting transformation when a transformation is applied to a figure and then another transformation is applied to its image
Corresponding Parts
Parts of congruent or similar figures that match
Indirect Measurement
A technique using properties of similar polygons to find distances or lengths that are difficult to measure directly

4. Vocabulary Scale Factor Similar Similar Polygons
The ratio of the lengths of two corresponding sides of two similar polygons
Similar
If one image can be obtained from another by a sequence of transformations and dilations
Similar Polygons
Polygons that have the same shape

5. What You’ll Learn in Lesson #1
You can prove two figures are congruent if one is the result of a translation, reflection, or rotation of the other
Transformations preserve length
Isometry

6. Identifying Congruence
Example
Determine if the two figures are congruent by using transformations
Reflection over vertical line
Translation
Triangles are congruent

7. Identifying Congruence
Example
Determine if the two figures are congruent by using transformations
Reflection then Translation
Figures are not congruent

8. Determine the Transformations
You can determine the transformations by analyzing the orientation or relative position of the figures
Translation
Reflection
Rotation
Length is the same
Orientation is the same
Orientation is reversed
Orientation is changed B B' B' B B B' A' A A A' A' A

9. Homework HC: pg. 99-100 (1-9) CC: pg. 99-100 (1-3, 5,6,9) Q2