Measurement and Types of Angles
Learn about different types of angles and how to measure and draw angles using a protractor. Let's get started! 🚀
Video Lesson
Watch and learn the basics
Flashcards
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🛎️ What is an Angle?
- An angle is formed when two lines meet at a point, called the vertex.
- Angles are measured in degrees (°).
🛎️ Types of Angles
- Acute angle: 0° < angle < 90°
- Obtuse angle: 90° < angle < 180°
- Reflex angle: 180° < angle < 360°
🛎️ How to Measure Angles?
- Place the centre of the protractor on the vertex.
- Align the zero line with one arm and read where the other arm crosses the scale.
🛎️ Measuring Angles Greater Than 180°
- Measure the smaller angle first using the protractor.
- Subtract from 360° to find the reflex angle.
🛎️ How to Draw Angles?
- Draw a straight line for one arm of the angle.
- Place the protractor, mark the required angle, then draw the second arm.
🛎️ Drawing Angles Greater Than 180°
- Subtract the given angle from 360° to find the smaller angle.
- Draw the smaller angle, and the reflex angle is the one you need.
Practice Questions
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Interactive Activity
Explore different types of angles by rotating the arm
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