1. Lesson 1-4 Angle Measure

2. Ohio Content Standards:

3. Formally define geometric figures. Recognize and apply angle relationships in situations involving intersecting lines, perpendicular lines and parallel lines.

4. Vocabulary:

5. Vocabulary: Degree -Degree -

6. Vocabulary: Degree –Degree – A unit of measure used in measuring angles and arcs.

7. Vocabulary: Ray –Ray –

8. Vocabulary: Part of a line that has one endpoint and extends indefinitely in one direction. AB

9. Vocabulary: OppositeOpposite Rays –

10. Vocabulary: OppositeOpposite Rays – Two rays BA and BC such that B is between A and C. BCA

11. Vocabulary: Angle –Angle –

12. Vocabulary: Formed by two noncollinear rays that have a common endpoint. B 4 A C Side AB Side AC Vertex A

13. Vocabulary: Sides –Sides –

14. Vocabulary: The two noncollinear rays that form an angle.

15. Vocabulary: Vertex –Vertex –

16. Vocabulary: The common endpoint of the two noncollinear rays that form an angle.

17. Vocabulary: Interior –Interior –

18. Vocabulary: A point that lies on the inside of an angle. D Point D is in the interior of the angle

19. Vocabulary: Exterior –Exterior –

20. Vocabulary: A point that lies on the outside of an angle. E Point E lies in the exterior of the angle

21. G F E D B A 6 5 4 3

22. G F E D B A 6 5 4 3 Name all angles that have B as a vertex. Name the sides of 5. Write another name for 6.

23. G F E D B A 6 5 4 3 Name all angles that have B as a vertex. Name the sides of 5. Write another name for 6.

24. G F E D B A 6 5 4 3 Name all angles that have B as a vertex. Name the sides of 5. Write another name for 6.

25. Vocabulary:

26. Vocabulary: Right Angle –Right Angle –

27. Vocabulary: An angle that measures exactly 90°.

28. Vocabulary: Acute Angle –Acute Angle –

29. Vocabulary: An angle that measures less than 90°.

30. Vocabulary: Obtuse Angle –Obtuse Angle –

31. Vocabulary: An angle that measures between 90° and 180°.

32. Vocabulary: Angle Bisector –Angle Bisector –

33. Vocabulary: A ray that divides an angle into two congruent angles.

34. Classify each angle named as right, acute, or obtuse. Y X W V U T S

35. Y X W V U T S

36. Y X W V U T S

37. Y X W V U T S

38. Wall stickers of standard shapes are often used to provide a stimulating environment for a young child’s room. A five-pointed star sticker is shown with vertices labeled. Find K J I HG E D C B A

39. Assignment: Pgs. 34 - 36 12-36 all, 52-60 all