Angles and Angle Pairs - Lesson 01 - Understanding and measuring angles

Sep 14, 2026

Uploaded by Hazel

Lesson on identifying and measuring angles, explaining that angles form when two rays or line segments meet at a common endpoint called the vertex. Covers how to measure an angle with a protractor using the center at the vertex, aligning the baseline to the 0 mark, then reading where the second ray intersects the scale. Includes practice examples with multiple angle measures and introduces straight angle pairs using the 180° sum.

LanguageEnglish

CategoryPresentations

FormatPPTX

Pages1

AccessFree to download

Understanding Angles

What are angles?

How to measure with a protractor

Measuring Angles - Lesson 01

Example angle measures

Measuring Angles - Lesson 02

Solving angle measurement tasks

Angle Pair Concepts

Pair of Angle B (sum 180°)

Straight angle pairs

Pairs of angles A, C, D, E, F

Activity and Wrap-up

Thank you and resources

Angles and Angle Pairs Do you want to build something? Understanding and measuring angles is essential when working with space, whether you want to improve an existing project or start a new one! Click on the "PowerPoint" button below this presentation preview. Start editing your presentation. Alternative: From Canva template file, Click on the "Share" button on the top right corner in Canva and click on "More" at the bottom of the menu. Enter "PowerPoint" in the search bar and click on the PowerPoint icon to download. Google Slides Click on the "Google Slides" button below this presentation preview. Make sure to sign in to your Google account. Click on "Make a copy." Start editing your presentation. Alternative: Click on the "Share" button on the top right corner in Canva and click on "More" at the bottom of the menu. Enter "Google Drive" in the search bar and click on the GDrive icon to add this design as a Google slide in your GDrive. PowerPoint Canva Click on the "Canva" button under this presentation preview. Start editing your presentation. You need to sign in to your Canva account. How to Use? Anglesand their Measures Lesson 01 rays vertex 60º What are angles? Formed when two rays or line segments meet at a common endpoint called vertex. How to measure an angle using a protractor? Place the protractor's center point at the angle's vertex. Step 1: Align the protractor's bottom line with the bottom ray of the angle at the 0 mark. Step 2: Find the angle measure by reading the number where the second ray intersects the protractor. Step 3: The angle is 30° Mastering Angles with a Protractor The angle is 50°. The angle is 130°. Measuring Angles Lesson 02 Measuring Angles Move the protractor and put it over the angles you want to measure. Use the "rotate" icon to adjust the position of the protractor. Angle : 130° 130° The first one is done for you. ° ° Angle : Angle : Solve This! ° ° ° ° Angle : Angle : Solve This! ° ° Activity Time! Pair of Angle B Show here that the sum of the pair is 180°. Draw the angle here. Angle B A 50°-angle 50° 40° Pair of Sample Angle 40° + 140° = 180° Sample Angle A 40°-angle 40° 140° Straight Angle Pairs Draw the pair of each given angle. The two angles should add up to 180°. Use Canva's elements and Draw tool. Use the protractor below to measure the angles. Make this smaller or bigger as needed! Pair of Angle A Show here that the sum of the pair is 180°. Angle A Right angle Draw the angle here. 90° Pair of Angle F Show here that the sum of the pair is 180°. Draw the angle here. Angle F A 65°-angle Pair of Angle D Show here that the sum of the pair is 180°. Angle D A 100°-angle Pair of Angle E Show here that the sum of the pair is 180°. Angle E A 150°-angle Draw the angle here. Pair of Angle C Show here that the sum of the pair is 180°. Angle C A 10°-angle Draw the angle here. Draw the angle here. 10° 100° 150° 65° Thank you! Resource Page Use these design resources in your Canva Presentation. This presentation template uses the following free fonts: Titles: Laila Headers: Kite One Body Copy: Nunito You can find these fonts online too. Happy designing! Don't forget to delete this page before presenting. This presentation template is free for everyone to use thanks to the following: SlidesCarnival for the presentation template Pexels for the photos Happy designing!

FAQs

What is an angle and what is the vertex?

An angle is formed when two rays or line segments meet at a common endpoint called the vertex.

How do you measure an angle using a protractor?

Place the protractor center at the vertex, align the bottom line with the angle’s bottom ray at the 0 mark, then read the number where the second ray intersects the protractor scale.

What is the rule for straight angle pairs?

Straight angle pairs are two angles that add up to 180°, so the two angles should total 180° when paired.

Sep 14, 2026

Uploaded by Hazel