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# Sec. 9.3

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### Sec. 9.3

1. 1. Learning Target:Students will learn how to classify angles and find missing angle measures using the definition of vertical, complementary and supplementary angles.<br />
2. 2. There are 4 different ways to classify angles. Can you without look tell me one way we classify angles?<br />
3. 3. http://instruction.aaps.k12.mi.us/EM_parent_hdbk/images/angles.jpg<br />
4. 4. Right Angle:An angle that is exactly 90 degrees.<br />
5. 5. Acute Angle:An angle whose measure is less than 90 degrees.http://www.mathleague.com/help/geometry/IMG00036.GIF<br />
6. 6. Obtuse Angle: An angle whose measure is between 90 and 180 degrees.http://www.mathsisfun.com/definitions/images/obtuse-angle.gif <br />
7. 7. Straight Angle: An angle that is exactly 180 degrees.http://www.mathsisfun.com/geometry/images/straight-angle.gif <br />
8. 8. When we put two angles together and they equal exactly 90 or 180 degrees they have special names for them.<br />
9. 9. Supplementary Angles:Two angles that add up to 180 degrees.http://www.mathsisfun.com/geometry/images/supplementary-angles.gif<br />
10. 10. Complementary Angles:Two angles that add up to 90 degrees.http://www.mathsisfun.com/geometry/images/complementary-angles.gifhttp://math8geometry.wikispaces.com/file/view/300px-Complementary_angles.svg.png/33819049/300px-Complementary_angles.svg.png<br />
11. 11. Vertical Angles:Are the opposite angles when two lines intersect. Vertical angles have the same angle measure.http://www.math.com/school/subject3/images/S3U1L5DP2.gif<br />
12. 12. Combined all the ideas we have talked about today to find the missing angles.http://image.wistatutor.com/content/feed/u346/2_0.GIF<br />
13. 13. Find the missing angles.http://image.wistatutor.com/content/feed/u147/vertically%20opposite%20angles%20example_0.JPG<br />
14. 14. Can you classify angles and find missing angle measures using the definition of vertical, complementary and supplementary angles?<br />