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Lesson 1-4

Lesson 1-4. Angle Measure. Ohio Content Standards:. Formally define geometric figures. Recognize and apply angle relationships in situations involving intersecting lines, perpendicular lines and parallel lines. Ohio Content Standards:. Vocabulary:. Degree -. Vocabulary:. Degree –.

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Lesson 1-4

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  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. Ohio Content Standards:

  4. Vocabulary:

  5. Degree - Vocabulary:

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

  7. Ray – Vocabulary:

  8. Ray – Part of a line that has one endpoint and extends indefinitely in one direction. Vocabulary: A B

  9. Opposite Rays – Vocabulary:

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

  11. Angle – Vocabulary:

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

  13. Sides – Vocabulary:

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

  15. Vertex – Vocabulary:

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

  17. Interior – Vocabulary:

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

  19. Exterior – Vocabulary:

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

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

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

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

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

  25. Vocabulary:

  26. Right Angle – Vocabulary:

  27. Right Angle – An angle that measures exactly 90°. Vocabulary:

  28. Acute Angle – Vocabulary:

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

  30. Obtuse Angle – Vocabulary:

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

  32. Angle Bisector – Vocabulary:

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

  34. Video Link: • http://www.teachertube.com/video/math-rocks-song-about-angles-80141

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

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

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

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

  39. 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 B G H A C K I J D E

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

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