# MATH 4 PPT Q3 W2 - Lesson 49 - Identify the different kinds of lines 2.pptx

30. May 2023
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### MATH 4 PPT Q3 W2 - Lesson 49 - Identify the different kinds of lines 2.pptx

• 1. Identify the different kinds of lines. a. b. c.
• 2. Name the given rays. • Look at the clock. • What time is it now? B A F G C D E H
• 3. Rosh, Lhei, and Claire attend piano lessons every Saturday. Rosh starts her lesoon at 3:00 p.m., Lhei at 2:00 p.m., and Clare at 12:45 p.m. • Who attend piano lessons every Saturday? • At what time does Rosh start her piano lesson? • How about Lhei? Clare? • If you are going to show in the clock the time their lessons start, how will you do it?
• 4. In pairs, draw the hand positions of the clock based on the situation given.
• 5. • For those pairs who were able to draw, label correctly the hands of the clock and explain your work. • The clocks represents a ray. • Label each ray with capital letters. • The hands shown by the clock represent an angle.
• 6. Look at the hands of the clock. How many hands does it have? What geometric figure does each hand represent? C B A 1
• 7. Ray AB meets with ray AC at point A. when two rays meet at a common endpoint, they form an angle. Point A, the common endpoint, is called the vertex. An angle can be named in 3 ways. BAC is read as “angle BAC.” CAB is read as “angle CAB.” A is read as “angle A” or 1 is read as “angle 1.”
• 8. An angle is measured in degrees (°). Angles can be classified according to their measurements. A right angle measures 90°. It forms a square corner. An acute angle measures less than 90°. It is smaller than a right angle. An obtuse angle measure more than 90° but less than 180°.
• 9. Name the angles below. What kind of angles are they?
• 10. Tell whether each kind of angle is right, acute, or obtuse. 1. 2. 3. 4. 5.
• 11. A. Tell whether each kind of angle is right, acute, or obtuse. 1. 2. 3. 4. 5.
• 12. B. Draw the following angles: 1. ABC – acute angle 2. DEF – obtuse angle 3. GHI – right angle
• 13. Give the kind of angle represented by each of the following figures: 1. 2. 3. 4. 5.
• 14. An angle is formed when two rays meet at a common endpoint. It is measured in degrees (°). Angles can be classified according to their measurements. A right angle measures 90°. It forms a square corner. An acute angle measures less than 90°. It is smaller than a right angle. An obtuse angle measures more than 90°, but less than 180°.
• 15. A. Using the figure at the right, identify the given angle (oriented counter clockwise) is right, acute, or obtuse. 1. AOB 2. BOC 3. DOE 4. FOD 5. COE O A B C D E F
• 16. B. Group pupils into six for the “Bring Me Game”. Let them bring the object that is required. The first group to bring the object will be given one point. 1. Objects with an acute angle. – example: triangular objects 2. Objects with an obtuse angle – example: picture stand 3. Objects with a right angle – example: chair
• 17. A. Give what is asked for in each item. 1. Name 2 objects with right angles. 2. Name 2 objects with acute angles. 3. Name 2 objects with obtuse angels. B. Draw your dream house using different angles. Label the angles used.
• 18. Write the letter of the correct answer. 1. What geometric figure is formed when two rays meet at a common endpoint? a. line b. point c. angle d. polygon 2. Which is the same as angle AOB? a. OAB b. OAB c. BAO d. O 3. What kind of angle is formed by the corner of a square table? a. right angle c. obtuse angle b. acute angle d. none of the
• 19. 4. What kind of angle is shown by an opened book whose measure is greater than 90°? a. right angle c. obtuse angle b. acute angle d. right or acute angle 5. What kind of angle is illustrated when the hands of a clock form
• 20. Draw a flower if the angle (oriented counter clockwise) shown is an acute angle, a star if it is a right angle, or a diamond if it if an obtuse angle. 1. 2. 3. 4. 5.
• 21. Study the illustration. 1. Name 5 acute angles. 2. Name 2 right angles. 3. Name 3 obtuse angles. O A B C D E F