1 / 28

Splash Screen

In this lesson, students will learn how to classify and measure angles, as well as identify the parts of an angle. They will use the number line and solve real-world problems involving angles.

rendone
Download Presentation

Splash Screen

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Splash Screen

  2. Five-Minute Check (over Lesson 1–3) Then/Now New Vocabulary Example 1: Real-World Example: Angles and Their Parts Key Concept: Classify Angles Example 2: Measure and Classify Angles Example 3: Measure and Classify Angles Lesson Menu

  3. A B C D Use the number line to find the measure of AC. A. 2 B. 4 C. 6 D. 8 5-Minute Check 1

  4. A B C D Use the number line to find the measure of DE. A. 3 B. 5 C. 7 D. 9 5-Minute Check 2

  5. A B C D Use the number line to find the midpoint of EG. A.D B.E C.F D.H 5-Minute Check 3

  6. A B C D Find the distance between P(–2, 5) and Q(4, –3). A. 12 B. 10 C. 5 D. 1 5-Minute Check 4

  7. A B C D Find the coordinates of R if M(–4, 5) is the midpoint of RS and S has coordinates (0, –10). A. (–8, 20) B. (–4, 15) C. (–2, –5) D. (2, 20) 5-Minute Check 5

  8. A B C D A boat located at (4, 1) can dock at two locations. Location A is at (–2, 9) and Location B is at (9, –11). Which location is closest? How many units away is the closest dock? A. Location A, 10 units B. Location A, 12.5 units C. Location B, 10 units D. Location B, 12.5 units 5-Minute Check 6

  9. You measured line segments. (Lesson 1–2) • Measure and classify angles. • Identify and use congruent angles and the bisector of an angle. Then/Now

  10. degree • right angle • acute angle • obtuse angle • angle bisector • ray • opposite rays • angle • side • vertex • interior • exterior Vocabulary

  11. Answer: Angles and Their Parts A. Name all angles that have B as a vertex. Example 1

  12. Answer: Angles and Their Parts B.Name the sides of5. Example 1

  13. C. Angles and Their Parts Example 1

  14. A B C D A. B. C. D. A. Example 1a

  15. A B C D A. B. C. D.none of these B. Example 1b

  16. A B C D A. B. C. D. Which of the following is another name for 3? C. Example 1c

  17. Concept

  18. Measure and Classify Angles A. Measure TYV and classify it as right, acute, or obtuse. Answer:mTYV = 90, so TYV is a right angle. Example 2

  19. Measure and Classify Angles Answer:180 > mWYT > 90, so WYT is an obtuse angle. Example 2

  20. Measure and Classify Angles Example 2

  21. A B C D A.Measure CZD and classify it as right, acute, or obtuse. A. 30°, acute B. 30°, obtuse C. 150°, acute D. 150°, obtuse Example 2a

  22. A B C D B.Measure CZE and classify it as right, acute, or obtuse. A. 60°, acute B. 90°, acute C. 90°, right D. 90°, obtuse Example 2b

  23. A B C D C.Measure DZX and classify it as right, acute, or obtuse. A. 30°, acute B. 30°, obtuse C. 150°, acute D. 150°, obtuse Example 2c

  24. Measure and Classify Angles INTERIOR DESIGN 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 mGBH and mHCI if GBH  HCI, mGBH = 2x + 5, and mHCI =3x – 10. Example 3

  25. Measure and Classify Angles Step 1 Solve for x. GBH  HCI Given mGBH  mHCI Definition of congruent angles 2x + 5 = 3x – 10 Substitution 2x + 15 = 3x Add 10 to each side. 15 = x Subtract 2x from each side. Example 3

  26. . Measure and Classify Angles Step 2 Use the value of x to find the measure of either angle. Answer:mGBH = 35, mHCI = 35 Example 3

  27. A B C D Find mBHC and mDJE if BHC  DJE, mBHC = 4x + 5, and mDJE = 3x + 30. A.mBHC = 105, mDJE = 105 B.mBHC = 35, mDJE = 35 C.mBHC = 35, mDJE = 105 D.mBHC = 105, mDJE = 35 Example 3

  28. End of the Lesson

More Related