Angles and types of angles powerpoint presentation ppt.pptx

What is an angle and types of angles

1. Sunrise University January 2024 Najisha P.T Maths – Angles Grade 5 9.08.2024

2. Recap Lines Line segment Ray 1. is a part of a line that is bounded by two distinct endpoints. 2. is a part of a line that starts at a certain point and extends infinitely in one direction. Line segment Ray

3. Learning Objectives Identify different types of angles Measure angles using a protractor

4. Angles 90° An angle is defined as the amount of turn between two rays that share a common end point. Angles are measured in degrees

5. the common point where the two rays meet vertex the rays that make up the angle arms degrees the measure of the size of an angle Parts of an angle

6. Types of Angles acute angle less than 90° obtuse angle more than 90° less than 180° right angle exactly to 90°

7. Types of Angles reflex angle more than 180° straight angle exactly to 180°

8. Measuring Angles Protractor is used to measure the angle

9. Measuring Angles Place the center of the protractor on the vertex B A B C Adjust the 0° baseline of the protractor so that it lines up with line BC 30°

10. Measuring Angles P R Q 45°

11. Draw an acute angle, a right angle, and an obtuse angle and measure them. Activity Time Group 1 Group 3 Group 2 Identify and name the type of each angle given below Using a protractor measure and name the type of each angle

12. SDG

13. زاوية Arabic term for angle zawia

14. Plenary These are angles whose measure is exactly 90° Acute angle Obtuse angle Right angle Straight angle (90° + 55°) is what kind of angle? Acute angle Obtuse angle Right angle Straight angle It is the sum of two right angles. Acute angle Obtuse angle Right angle Straight angle

15. Home Assignment Next class We will practice more on drawing different types of angles using protractor Given below are clocks. Show the time using needles to depict the corresponding angles.