1. 1.3 Creating Definitions Geometry

2. DO NOW:

3. Go Over HW

4. Writing Assignment When is “NO” more valuable of a response to a question then “YES”??? 10 mins

5. Can you solve this? 2, 4, 8 what is my rule? https://www.youtube.com/watch?v=vKA4 w2O61Xo

6. We are now going to create our own definitions Look at the examples given and come up with a specific definition.

7. Right Angles A right angle is an angle measuring 90 degrees. Examples:

8. Acute Angles An acute angle is an angle measuring between 0 and 90 degrees. Example:

9. Obtuse Angles An obtuse angle is an angle measuring between 90 and 180 degrees. Example:

10. Complementary Angles Two angles are called complementary angles if the sum of their degree measurements equals 90 degrees. Example: These two angles are complementary.

11. These two angles can be "pasted" together to form a right angle!

12. Supplementary Angles Two angles are called supplementary angles if the sum of their degree measurements equals 180 degrees. Example: These two angles are supplementary.

13. These two angles can be "pasted" together to form a straight line!

14. Vertical Angles angle AEB and angle DEC are called vertical angles. Angle BEC and angle AED are also vertical angles. Vertical angles have the same degree measurement.

15. Review State whether the following are acute, right, or obtuse. 1. 2. 3. 4. 5. ? ? acute obtuse right obtuse acute

16. Complementary and Supplementary 1. Two angles are complementary. One measures 65 degrees. 2. Two angles are supplementary. One measures 140 degrees. Find the missing angle. Answer : 25 Answer : 40

17. Complementary and Supplementary Find the missing angle. You do not have a protractor. Use the clues in the pictures. 1. 2. x 55165 x X=35 X=15

18. Vertical Angles Find the missing angle. You do not have a protractor. Use the clues in the pictures. 58 x X=58

19. More drawings 20 C J D E F G H 70 90 70 20 90

20. Final Drawing 52 B A FE D C 60 G 68 60 52

21. Investigation 2 Creating Angles with Patty Paper Each person will be given a piece of patty paper. I want you to alone fold the paper to show different types of angles. LABEL WHAT YOU SEE. Then we will share our work with each other after.

22. Exit Slip 1.3 D C E I F b H a G