1. Bell Ringer
Name all the sets of numbers to which each real number belongs. #1. -36/4 # # … #4. -√81

2. Don’t Forget
Supply check is TOMORROW

3. Homework Check Section 10.2 #1-13

4. Homework Check Section 10.2 #1-13

5. Section 10.3 Triangles
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6. Vocabulary Line Segment – Part of a line containing two
endpoints and all of the points between
them
Triangle – Formed by three line segments that
intersect only at their endpoints
Vertex- The point where the segments of a
triangle intersect.

7. Notes

8. Notes

9. Example 1 Find Angle Measures

10. Example 2 Find Angle Measures

11. Your Turn Practice Finding Angle Measures

12. Example 3 Use Ratios to Find Angle Measures

13. Example 4 Use Ratios to Find Angle Measures

14. Your Turn Practice Using Ratios to Find Angle Measures

15. Vocabulary Acute Angle – An angle that is less than 90°
Obtuse Angle – An angle that is between 90° and180 °
Right Angle – An angle that is equal to 90°
Straight Angle – An angle that is equal to 180 °

16. Angles can be classified by their degree measure
Notes
Angles can be classified by their degree measure

17. Example 5 Classify Angles

18. Example 6 Classify Angles
Humans have jaws that can open to about 45°. What type of angle is formed by the jaws of a human?

19. Your Turn Practice Classifying Angles

20. Vocabulary Scalene Triangle – A triangle with no congruent sides
Isosceles Triangle – A triangle with at least 2
Equilateral Triangle – A triangle with all sides
congruent
Congruent Sides - Sides that have the same
length

21. Triangles can be classified by their angles.
Notes
Triangles can be classified by their angles.

22. Notes
Triangles can also be classified by their sides

23. Example 7 Classify Triangles

24. Example 8 Classify Triangles

25. Your Turn Practice Classifying Triangles

26. Section 10.2 #1-17

27. Section 10.2 #1-17

28. Section 10.2 #1-17