1. All About Linear Pairs
Find the measure of y.

2. Warm Up: Find the measure of the angles.
4.3 Rotations
Warm Up: Find the measure of the angles.
1) BOE = 20       2) BOD = 50      3) BOA = 180     4) AOC = 60       
5) AOE = 160     6) COD = 70      7) EOC = 100     8) DOE = 30

3. 4.3 Rotations
Students will need a protractor.  If direction isn't mentioned then all rotations are counter clockwise.
Constructing a Rotation – Draw a 60  rotation of triangle ABC about point P.

4. 4.3 Rotations
Graph triangle ABC with A(3, 1) , B(3, 4), and C(1, 1).  Then rotate it 180 degrees about the origin.

5. 4.3 Rotations
Learning Check: Graph triangle DEF with D(-3, -1) , E(-1, 2), and F(4, -2).  Then rotate it 270 degrees about the origin.

6. 4.3 Rotations
Recall a Composition Transformation is a combination of 2 or more transformations.
Let line segment XY have endpoints X(-3, 1) and Y(4, -5).  Perform the following composition transformation.
Reflection about the line y = x.
Rotate 180 degrees about the origin.

7. 4.3 Rotations
Recall a Composition Transformation is a combination of 2 or more transformations.
Let line segment XY have endpoints X(-3, 1) and Y(4, -5).  Perform the following composition transformation.
Reflection about the line y = x.
Rotate 180 degrees about the origin.