Angles as Turns Class 5 Maths Chapter 3 CBSE Notes 2025-26

In this chapter, students learn how angles can be understood as turns that objects or people make in daily life. When playing the “Statue” game, for example, children rotate themselves and observe how much they have turned from their original position. Through such simple activities, we see that turning our bodies or objects can help us understand the concept of angles in a practical way.

Full Turns and Half Turns in Real Life We see turns in everyday situations, such as the movement of the minute hand of a clock or a giant wheel returning to its starting place. If someone makes a full turn, they come back to the original position. A half turn brings them to the opposite side. Two half turns make a full turn, and four quarter turns also complete a full turn. This understanding of turns helps to relate physical actions to mathematical angles.

Everyday Objects and Their Turns Many everyday items involve turns. For example, taps, clothes clips, doors with hinges, tongs, scissors, and file covers all move by turning. The maximum turn possible for each object varies—some only open a little (less than a quarter turn), while others can open more or rotate completely. When examining such objects, students are encouraged to think about which can make a half turn or even a full turn.

Exploring Angles Using Straws Simple experiments, like joining two straws and rotating one while keeping the other fixed, help us see the formation of different angles. A quarter turn forms a right angle, less than a quarter turn is called an acute angle, and a turn more than a quarter but less than a half is called an obtuse angle. Through these hands-on activities, we learn that angles arise whenever there is a turn.

Types of Turns and Angles Let’s review the main types:

• A quarter (1/4) turn is a right angle.
• Less than a quarter turn is an acute angle.
• More than a quarter but less than a half turn forms an obtuse angle.
• A half (2/4) turn is a straight angle.
• A full turn brings you back to the starting position; it is a complete circle.

Activities like making a paper fan or building model houses with notebooks help students observe real angles—right, acute, or obtuse—in the objects around them. Drawing or folding shapes to include specific angles further strengthens this concept.

Angle Measuring Tool Activity Students can create simple angle measuring tools by folding a paper circle into equal parts (like 1/8, 1/6, or 1/12) and attaching a straw to the center. By rotating the straw through different sections, they can show 1/8 turn, 1/4 turn, 3/8 turn, and so on. This makes it easier to recognize and estimate different angles.

When using their angle measuring tools, learners can estimate and check the size of different angles. For example, is a certain angle less than a right angle (acute), exactly a right angle, or greater than a right angle (obtuse)? Combining portions of turns (like 1/4 + 1/8) helps in visualizing and identifying various angles in objects and drawings.

Turns in Clocks and Time The movement of the minute hand of a clock is an ideal way to relate turns and time:

• A 15-minute movement is a quarter turn.
• A 30-minute movement is a half turn.
• A 45-minute movement is three-quarters of a turn.
• A full turn is 60 minutes.
• A 1/6 turn is 10 minutes; 1/12 turn is 5 minutes.

Being able to match turns with minutes helps students connect the concept of angle to daily life and the clock face.

Clockwise and Anti-clockwise Movements The hands of a clock move in the clockwise direction. When objects or people turn in the opposite direction, it is called anti-clockwise movement. Many actions, like opening a jar or unscrewing a nut, require us to notice whether we are moving clockwise or anti-clockwise. Practicing by observing these directions makes students comfortable with both terms.

There are various activities where students are asked to identify the direction of movement (clockwise or anti-clockwise) of objects or creatures that have turned a quarter. This brings in visual practice and observation.

Fun with Turns: Facing Directions Games involving facing different directions after specific turns enhance understanding. For instance, a person starting by facing North, after two right angles (quarter turns) clockwise, will be facing South. Tables like the one below can be completed for practice:

Exercises ask for alternative ways to reach the same direction, or scenarios like, “If Padma is facing the toy shop, what will she face after a half turn clockwise?” These problems make students think deeply about movement and orientation.

Hands-on Practice and Reasoning The chapter encourages students to estimate, draw, and measure angles in various shapes. They learn to guess measures, use their angle tools for verification, and classify each angle as acute, right, or obtuse. Practice also includes drawing angles corresponding to fractions of turns—like 1/6, 3/12, or combinations like 1/8 + 1/6 turn.

Throughout the chapter, students are regularly prompted to observe, think, and discuss their reasoning with classmates. This process makes the topic of angles as turns both interactive and enjoyable, ensuring a strong understanding of how mathematical concepts relate to the real world.

Class 5 Maths Chapter 3 Notes – Angles as Turns: Important Revision Points

Get clear and structured revision with Class 5 Maths Chapter 3 Angles as Turns notes. These notes break down the idea of turns, angles, and real-life examples so you can understand and remember key points quickly. The content covers clockwise, anti-clockwise, and different angle types for thorough preparation.

Reviewing these NCERT revision notes will make your exam preparation easier by summarizing concepts with simple explanations and hands-on activities. Practice questions, tables, and examples help you connect maths to daily life while sharpening your understanding of turns and angles.